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a cone of radius 10 cm is divided into two parts by drawing a plane through the midpoint of its axis , parallel to its base . compare the volume of the two parts
a farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank in his field , which is 10m in diameter and 2 m deep. If water flows through the pipe at the rate of 3km/hr , in how much time the tank be filled ?
A well of diameter 3m ,dug 14m deep. The earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4m to form an embankment. Find the height of the embankment.
a warehouse is used as a granary. is is the shape of a cuboid surmounted by a half-cylinder. the base of the shed is 6m x 14m and its height is 8m. find the surface area of the non-cubiodal part.
The height of a cone is 30cm.A small cone is cut off at the top by a plane parallel to the base.If its volume be 1/27 of the volume of the given cone,then what is the height above the base at which the section is made?
water is flowing at the rate of 15km/hr through a pipe of diameter 14 cm into a rectangular tank which is 50m long and 44m wide . find the time in which the level of water in the tank will rise by 21 cm
A hollow cone is cut by a plane parallel to the base and the upper portion is removed. If the curved surface area of the remainder is 8/9th of the curved surface of the whole cone, find the ratio of the line segments into which the cone's altitude is divided by the plane.
a cylinder , a cone and a hemisphere of equal base have the same height. what is their ratio in their volumes ?
the floor of a rectangular hall has perimeter 120m. if the cost of painting the four walls at rate of 10msq is Rs.6000 find height of hall
A hemispherical tank , full of water , is emptied by a pipe at the rate of 25/7 litres per second. How much time will it take to empty half the tank if the diameter of the base of the tank is 3 m ?
A reservoir is in the form of a cuboid. It's length is 20m. If 18 kl of water is removed from the reservoir, the water level goes down by 15cm. Find the width if the reservoir.
A cone of maximum size is carved out from a cube of edge 14cm . FInd out the surface area of the cone and of the remaining solid left out after the carved out . Plzz Answer ....
A right triangle whose sides are 15 cm and 20 cm is made to revolve about its hypoteneous.Find the volume and the surface area of the double cone so formed. (Take pie = 3.14
The radius of a sphere is rcm.It is divided into two equal parts.The whole surface areas of two parts will be?
the rainwater from a roof 22m*20m drains into a cylindrical vessel having diameter of base 2 m and height 3.5m . if the vessel is just full , find the rainfall in cm.
pls do this problem in simple method
total surface area of an hollow sphere and hemisphere?
If the diameter of a sphere is decreased by 25%, then by what percent its curved area would decrease?
What is the difference between curved surface area & total surface area?
the barrel fountain pen cylindrical in shape is 7cm long and 5mm in diameter. a full barrel of ink in the pen is used up in writing 330 words
on an average.
how many words would use up a bottle of ink containing one fifth of a litre?
A hemispherical dome ,open at the base is made from a sheet from of fibre. If the radius of the hemispherical dome is 40 cm and 13/170 part of the fibre is actually wasted in making the dome , find the cost of the dome at the rate of Rs. 35 per 100 cm2 (use pi = 3.14)
A sphere of diameter 12 cm is dropped in a right circular cylinder vessel partly filled with water. If the sphere is completely submerged in water, the water level in the cylindrical vessel rises by 32/9cm. find the diameter of the cylindrical vessel.
a copper wire 3mm in diameter ,is wound about a cylinder whose length is 12cm , and diameter 10cm so as to cover the csa of the cylinder . find the length and mass of the wire , assuming the density of copper to be 8.88g per cm3
a bucket made up of metal sheet is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper ends as 8 cm and 20 cm respectively. find the cost of the bucket if the cost of the metal sheet is Rs. 15 per 100 cm3 ( use pi= 22/7)
if h,c,v are respectively the height, curved surface area and the volume of a cone.prove that
3 pie v h cube - c2h2 + 9v2 =0
A hemispherical depression is cut-out from one face of a cubical wooden block such that the diameter l of the hemisphere is equal to the edge of the cube. Determine the surface area of the remaining solid.
What is the CSA, TSA and volume of a frustum?
The difference between the outer and inner curved surface areas of a hollow right circular cylinder, 14cm long, is 88cm2. If the volune of metal used in making the cylinder is 176cm3, find the outer and inner diameters of the cylinder
a sphere of diameter 6cm is dropped in a right circular cylindrical vessel partly filled with water . the diameter of the cylindrical vessel is 12cm. if sphere is completely submerged in water by how much will the level of water rise?
A conical vessel of radius 6cm and height 8cm is completely filled with water. A spere is lowered into the water and its size is such that when it touches the sides, it is just immersed. What fraction of water overflows?
what is the ratio of the small cone to the whole cone after when the cone is cut into two parts at the middle of its height????
a bucket i sin the form of frustum with the capacity of 12308.8 cm cube.the radii of the top and bottom of circular ends are 12 cm and 20 cm resp.find the hieght of the bucket and also the area of metal sheets used in making the bucket.(use pie=3.14)
A bucket is in the form of a frustum of a cone of height 30 cm with radii of its lower and upper ends as 10 cm and 20 cm respectively. Find the capacity and surface area of the bucket. Also find the cost of milk which can completely fill the container at the rete of Rs.25 per litere . (Pie = 22/7).
Two cubes each of side 4cm are joined end to end.Find the surface area of the resulting cuboid
A well of diameter 3m, is dug 14m deep The earth taken out of it has been evenly spread all around it to a width of 4m, to form an embankment Find the height of the embankment use pi=22/7
If the diameter of the cross section of the wire is decreased by 5%,how much %will the length be increased so that the volume remains the same
two men on either side of the cliff, 60m high, observe the angles of elevation of the top of the cliff to be 45 degrees and 60 degrees respectively. find the distance between two men.
A shuttle cock used for playing badminton has the shape of a frustum of a cone mounted on a hemisphere (see figure). The diameters of the ends of the frustum are 5 cm and 2 cm , the height of the entire shuttle cock is 7 cm. Find the external surface area. (Take Pie=22/7) .
A cone, a hemisphere and a cylinder stand on equal bases and have the same height. Find the ratio of their volumes>
From a solid cylinder whose height is 2.4 cm and diameter 1.4 cm, a conical cavity of the same height and same diameter is hollowed out. Find the total surface area of the remaining solid to the nearest cm2.
Height (h) of the conical part = Height (h) of the cylindrical part = 2.4 cm
Diameter of the cylindrical part = 1.4 cm
Therefore, radius (r) of the cylindrical part = 0.7 cm
Total surface area of the remaining solid will be
= CSA of cylindrical part + CSA of conical part + Area of cylindrical base
The total surface area of the remaining solid to the nearest cm2 is 18 cm2.
Why C.S.A. of cone is added instead of subtracting(cause we have to find T.S.A. of remaining part)???
The interior of a building is in the form of a cylinder of diameter 4.3m and height 3.8m, surmounted by a cone whose vertical angle is a right angle. Find the area of the surface and volume of the building.
if the radius of a circle is doubled its area becomes ?
The height of right circular cone is trisected by two plane parallel to its base. Show that the volume of the three propotion from top are in ratio 1:7:19.
A swimming pool is filled by 3 pipes with uniform flow, The first two pipes operating simultaneously, fill the pool in the same time during which the pool is filled by the 3rd pipe alone. The 2nd pipe fills the pool 5 hours faster than the 1st pipe & 4 hours slower than the 3rd pipe. Find the time required by each pipe to fill the pool separately.
cost of painting the total outside surface of a closed cylindrical oil tank at 60 paise per sq. dm is rs.237.60 . the heigth of the tank is 6 times the radius of the base of tank . find its volume correct to two decimal point...? and is que. in easy
the cost of painting the total surface area of a closed cylindrical oil tank at 60 paise per sq dm is Rs.237.60 and the height of the tank is 6 times the radius of the base of the tank. finnd the volume ..
A gulab jamun, contains sugar syrup up to about 30% of its volume. Find approximately how much syrup would be found in 45 gulab jamuns, each shaped like a cylinder with two hemispherical ends with length 5 cm and diameter 2.8 cm (see the given figure).
t can be observed that
Radius (r) of cylindrical part = Radius (r) of hemispherical part =
Length of each hemispherical part = Radius of hemispherical part = 1.4 cm
Length (h) of cylindrical part = 5 − 2 × Length of hemispherical part
= 5 − 2 × 1.4 = 2.2 cm
Volume of one gulab jamun = Vol. of cylindrical part + 2 × Vol. of hemispherical part
Volume of 45 gulab jamuns == 1,127.25 cm3
Volume of sugar syrup = 30% of volume
plz tell me why it is voulume of gulab jamun is taken to find the sugar suyrup. why we can't take area of gulab jamun in the place volume because container contain gulab jamun we can take their area and then the volume of container. im not able to understand the question. please try to explain with proper diagram.
A semicircular sheet of metal os diameter 28cm is bent into an open conical cup.The depth of the cup is..........
Water is flowing at the rate of 3km/hr through a circular pipe of 20cm internal diameter into a circular cistern of diameter 10m and depth 2m.In how much time will the cistern be filled? Also, plzz tell that here what is meant by cistern?????
the diameter of a cycle wheel is 21 cm. how many revolutions willl it make to travel 1.98 km? plsssssssss answer soon
A cylindrical copper rod of diameter 1 cm and length 8 cm is drawn into a cylindrical wire of length 18 m and of unifiorm thickness. Find the thickness of the wire.
A tent is in the shape of a cylinder surmounted by a conical top.
If the height and diameter of the cylindrical part are 2.1 m and 4 m
respectively, and the slant height of the top is 2.8 m, find the area
of the canvas used for making the tent. Also, find the cost of the
canvas of the tent at the rate of Rs 500 per m2. (Note
that the base of the tent will not be covered with canvas.)
how to take the cube of 1728?
find the area of the shaded region where ABCD is a square of side 14cm . ( four equal circle inside the square) . And please explain me how the radius is obtained .
Water in a canal 6m wide and 1.5m deep is flowing with a speed of 10km/hr.How much area will it irrigate in 30 minutes , if 8cm of standing water is needed
the derivatio of the formula of frustum of cone
the radii of circular bases of a right circular cylinder and a cone are in the ratio of 3:4 and their heights in the ratio 2:3 . What is the ratio of their volumes?
A container, opened
from the top and made up of a metal sheet, is in the form of a
frustum of a cone of height 16 cm with radii of its lower and upper
ends as 8 cm and 20 cm respectively. Find the cost of the milk which
can completely fill the container, at the rate of Rs.20 per litre.
Also find the cost of metal sheet used to make the container, if it
costs Rs.8 per 100 cm2. [Take π = 3.14]
A cone made of paper has height 3h and vertical angle 2 alpha. It contains 2 other cones of height 2h and h & vertical angles 4 alpha and 6 alpha respectively. Find the ratio of the 2 volumes in between the cones.
in one fortnight of a given month ,there was a rainfall of 10cm in a river valley .if the area of the valley is 97280 km sq. ,show that the total rainfall was approx. equivalent to the addition to the normal water of the three rivers each ,1072 km long ,75m wide and 3m deep.
PLEASE HELP THIS ANSWER IS NOT AVAILABLE ON MERITNATION NCERT SOLUTION.
a sphere and a cube have equal surface areas . what is the ratio of the volume of the sphere and the cube
How to derive the formula for voulume of frustum of a cone?
- How to derive the relation bnetween the orginal cone radius / height to the portion of the cone that is removed?
Q) A solid is in the shape of a cone mounted on a hemisphere of same base radius.If the curved surface areas of teh hemispherical part and the conical part are equal,then find the ratio of the radius and the height of the conicall part?
Q) A sphere of diameter 6cm is dropped into cylindrical vessel,partly filled with water ,whose diameter is 12cm.If the sphere is completely submerged in water , by how much time will the surface of water be raised in the cylindrical vessel?
Water is flowing through a cylindrical pipe, of internal diameter 2cm, into a cylindrical tank of base radius 40cm, at the rate of 0.4m/s. Determine the rise in level of water in the tank in half an hour.
From a cylinder of radius 7 m and height 24 m, a cone of same radius and same height is taken out. Find the surface area of the remaining part. If the inner portion of this remaining part is painted in pink colour at the rate of Rs 23 per 5 m2and the exterior portion is painted in green colour at the rate of Rs 40 per 11 m2, then find the total cost required to paint such a solid.plz answer this
From a cylinder of radius 7 m and height 24 m, a cone of same radius and same height is taken out. Find the surface area of the remaining part. If the inner portion of this remaining part is painted in pink colour at the rate of Rs 23 per 5 m2and the exterior portion is painted in green colour at the rate of Rs 40 per 11 m2, then find the total cost required to paint such a solid.
plz answer this
Marbles of diameter 1.4 cm are dropped into a cylindrical beaker of diameter 7cm containing some water. Find the number of marbles that should be dropped into the beaker so that the water level rises by 5.6cm??
(please explain step-wise) :))
A container shaped like a right circular cylinder having diameter 12 cm and height 15 cm is full of ice cream. The ice cream is to be filled into cones of height 12 cm and diameter 6 cm, having a hemispherical shape on the top. Find the number of such cones which can be filled with ice cream
A hemispherical tank of radius 1.75 m is full of water . it is connected with a pipe which empties it at rate of 7 litre per second . how much time will it take to empty the tank completely ?
A solid toy is in the form of a hemisphere surmounted by a right circular cone.Height of the cone is 2cm and the diameter is 4cm. If a right circular cylinder circumscribes the solid,find how much more space it will cover.
The curved surface area of a cylinder is 264m2 and its volume is 524m3. Find the ratio of its diameter to its height
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