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Syllabus

what is the formula of diagonal of cube and cuboid

the dimensions of acuboid are in the ratio 3:2:2 and the lateral surface area of the cuboid is 200m

^{2}. the outer surface of cuboid is painted with enamel at the rate of @ 10 per m^{2}. find the total coast of painting the outer surface of cuboid .a semi circular sheet of metal of diameter 28 cm is bent to form a cone. find the capacity of the cone.

One iron solid is a cuboid of dimension 30cm x 30 cm x 42.6cm.It is melted and cubes each of 3 cm are mouled from it.Find the number of cubes formed.

Three cubes whose edges measure 3cm,4cm,5cm respectively to form a single cube.Find its edge.Also find the surface area of the new cube.

The teacher asked the students to prepare a project work related to Diwali. Lipsa prepared 12 cylindrical candles each having radius of base 2cm and height 7cm. Himanshu prepared 14 fire crackers each of spherical shape of radius 1.54cm.

a) Find the volume of candles and firecrackers

b) According to you which has better project work and why?

c) Which message has been conveyed in the above information?

The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm respecttively. If the cost of painting 1 sq.cm of the surface area is Rs. 0.05, find the total cost of painting the vessel all over.

Please check my answer thoroughly.

The answer is attached.

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Find the volume of the largest right circular cone that can be cut off from a cube whose

edge is 9 cm... use pie = 22/7

Cone

Sphere

Hemisphere

. The volumes of the two spheres are in the ratio 64: 27. Find the ratio of their surface area.

^{3})^{3}( r^{3}/ 2 )^{3}( r^{3}/8 )^{3}/8 )Pls answer this question with steps .

the ratio of curved surface area to the total surface area of right circular cylinder is 1:3. Find the volume of the cylinder if its total surface area is 1848cm

^{2}.[pie =22/7]The sum of length, breadth and depth of a cuboid is 19 cm and the length of its diagonal is 11 cm. Find the surface area of the cuboid.

I will give a thumbs up for sure

the volume of a metallic cylindrical pipe is 748 cm3. its length is 14cm n external radius is 9 cm. find its thickness.

^{}m^{3}of earth . The number of rounds the truck has to make to dispose the earth are?what is the difference between total surface area and curved surface area?

a solid cuboid of size 10m*8m*6m is melted and recast into a cylinder of height 7m. How much minimum molten material is required so that radius of cylinder so formed is a natural number.

a tent of shape of a right circular cylinder upto a height of 3m and then becomes a right circular conewith height of 13.5m above the ground calculate the cost of painting the inner side of the text at the rate of RS 2 PER Sq m if radius of the base is 14m

a solid metallic right circular cone 20 cm high with vertical angle 60 is cut into two parts at the middle point of its height by a plane parallel to the base. its frustum, so obtained be drawn into a wire if diameter 1/16 cm, find the length of the wire .

64 solid metallic spheres , each sphere of radius 0.15cm are melted to form a single bigger sphere . find the radius of the bigger sphere.

If each edge of a cube is increased by 50%,then find the percentage increase in its surface area ?

Q.2.The dimension of a rectangular box are in the ratio 2:3:4 and the difference between the cost of covering it with a sheet of paper at the rate of Rs.4 and Rs.4.50 per square metre is Rs.416.Find the dimensions of the box.

Please check the solutions of these questions which is posted by me.

Kindly check it fast as tomorrow is my maths exam.

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A storage tank is in the form of a cube. When it is full of water, the volume of the water is

A closed cylindrical water tank is made from a plastic sheet.Its diameter is 1.4m and the height is 3.5m.Find the actual area of the plastic sheet used, if 1/3of the sheet actually used was waisted in making the water tank.(take pie 22/7)

A cone, a hemisphere and a cylinder stand on equal bases and hve the same height , find the ratio of their volumes.

A cone of height 24cm has a C.S.A 550m2 .Find its volume (pie =22/7)

the radius and height of a right circular cone are in the ratio 5:12 if its volume is 314cm find the slant height and curved surface area

1.in a 20-20 cricket match .a batsman has hit boundary 7 times in 20 balls ,he has played so far.what is the chance that next ball.

i) will also hit a boundary ? ii) will not cross the fence?

2) the sum of length, breadth and height of cuboid is 19cm.also length of its diagonal is 11cm what is the surface area of the cuboid? [(l+b+h)^2 = (digonal)^2 + TSA]

A woodcutter desires to make dusters for schools. he plans to make dusters of dimensions 10cm x 4cm x 3cm. How many dusters can be made from a wooden plank of dimensiions 4m x 3m x 1m?

a conical vessel whose internal radius is 5 cm and height 24 cm full of water.the water is emptied into a cylinderical vessel with internal radius 10 cm. find the height to which water rises?

the total surface area of a solid cylinder is 231 cm2 and its curved surface area is 2/3 of total surface area.Find the volume of the cylinder solution

find the volume of iron required to make an open box whose external dimensions are 36 cm*25cm*16.5cm,the box being 1.5cm throughout. if 1 cm3 of iron weighs 8.5 grams ,find the weight of the empty box in kilograms?

A metal pipe is 77cm long. The inner diameter of a cross section is 4 cm, the outer diameter being 4.4 cm. Find its

(i)inner curved surface area

(ii)outer curved surface area

(iii)total surface area

the radius and height of a cone are in the ratio 4:3.tha area of the base is 154cm

^{2}.find the area of the curved surface area.WHAT IS THE VOLUME OF A HOLLOW HEMISPHERE

The radius and slant height of a cone are in the ratio 4:7.If its curved surface area is 792cm

^{2},find its radiusA dome of a building is in the form of a hemisphere.From inside it was washed at the cost of Rs. 498.96 .If the cost of white washing is Rs. 2.00 per square metre,find the inside surface area of the dome and volume of the air inside the dome.

If the volume of a sphere is numerically equal to its surface area, then radius of the

A 20m deep well with diameter 7m is dug and the earth from digging is evenly spread out to form a platform 22m by14m.Find the heinght of the platform.

If the radius of a sphere is increased by 10 % , by how percent does the volume increase .

A cone has a volume of 1650 cm

^{3}.If height of the cone is 28 cm, then find the radius and area of base of the cone.The surface area of a sphere of radius 5cm is five times the area of the curved surface of a cone of radius 4cm. Find the height and volume of the cone (pi = 22/7)

water in a canal 30dm wide and 12dm deep is flowing with a velocity of 20km/hr. How much area will it irrigate in 30 min if 9cm of standing water is desired ?

water flows out through a circular pipe whose internal diameter is 2cm at the rate of 0.8m/s into a cylindrical tank, the radius of whose base is 40cm. by how much will the level rise in one and half hour?

ashima has constructed a cubical water tank with lid for her house with each outer edge 300 cm long. she gets the inner four walls and the lid covered with square tiles of side 20 cm . find the amount she spent on tiles , if it is given that the cost of 4 tiles is rs. 160

a rain water which falls on flat rectangular surface of lenth 6m , 4m is transferred into a cylendrical vessel of internal radius of 20cm . what will be the height of the water in the cylendrical vessel if rainfall is 1cm .

A well 3.5m in diameter and 20m deep. is dug in a rectangular field 20m x14m. The earth taken out is spread evenly on the field.Find the level of earth raised in field .

a copper wire of diameter 6mm is evenly wrapped on a cylinder of length 15cm and diameter 49cm to cover its whole surface . find the length and volume of the wire. if the specific gravity of copper be 9kg per cu cm , find the weight of the wire.

In solution of exercise 13.2

it is given (198 +198/7)cm

^{2 }=1584/7.how will u get it.please explain it properly.appreciate your urgentreply

The total surface area of a solid right circular cylinder is 231 cm

^{2}. Its curved surface is ⅔^{rd}of the total surface. Determine the radius of its base and height.If the height of the cylinder is 21 cm then

a) What is the value of ' a ' ?

b) What is the curved surface area of a sphere ?

c) Which value is shown by Ashwini ?

A cloth having an area of 165 m2 is shaped into the form of a conical tent of radius

Find the length of the longest rod that can be placed in a room of dimensions 30m x 24m x 18m.

a) what is the amount spent in purchasing the cardboard at the rate of rs 20 per

100msquare

b) which value is depicted by the student

A sphere and a right circular cylinder of the same radius have equal volumes.By what percentage does the diameter of the cylinder exceed its height

A cylindrical tube open at both ends is made of iron sheet which is 2cm thick. If the outer diameter is 16cm and its length is 100cm , find how much cubic centimeters of iron have been used in making the tube?

ANS : 200 hrs

dear experts answer it no links

A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5 cm, find the outer curved surface area of the bowl. (Take pie=3.14)

curved surface area of an icecream cone of slant height 12cm is 113.04cm2.find the base radius and height of the cone(pi is 3.14)

A closed iron tank 12m long,9m wide and 4m deep is to be made .determine the cost of iron sheet used at the rate of rupees 50 per metre the sheet being 2m wide.

A sphere,cylinder,and cone are of the same radius and same height. Find the ratio of their curved surface area. please answer it

P and Q are two cylinders having equal total surface areas.The radius of each cylinder is equal to the hieght of the other. The sum of the volumes of both the cylinders is

250π cm. Find the sum of their curved surface areas.^{3}(in cm.^{2})## A solid cube is cut into 2 cuboids of equal volumes. find the ratio of the total surface area of the given?

A cylindrical tub of radius 12 cm contains water to a depth of 20 cm. A spherical ball is dropped into the tub raising the level of water by 6.75 cm. What is the radius of the ball?

A solid cube of side 12cm is cut into eight cubes of equal volume. wat will be the side of the new cube also . find the ratio between thier surface areas (surface area of 8new cubes and the original cube)?>

a cell phone has dimensions 10cm x 5cm x 2cm. how many cell phones can be arranged in a box of dimensions 10cm x 10cm x 15cm ?

What is a frustum. What is the total surface area, curved surface area and the volume of a frustum.Could yu give one or 2 examples.

If each of the length, breadth and height of a cuboid is doubled, its TSA becomes-

(a) Twice (b) Thrice (c) Half (d) Four times

A right circular cone of diameter r cm and height 12cm rests on the base of a right circular cylinder of radius r cm. Their bases are in the same plane and the cylinder is filled with water upto a height of 12cm. If the cone is then removed, find the to which the water level will fall.

a cube and cuboid have same volume. dimentions of cuboid are in the ratio 1:2:4. if the difference betwween the cost of polishingthe cube and the cuboid is at the rate of rs5 /m2 is rs 80, find the volumes

Ratna Sagar,Page No.13.66,exercse-13D,Question No.15

A conical tent is to accommodate 11 person.Each person must have 4m

^{2}of the space on the ground and 20m^{3}of air to breath.Find the height of the cone.A wall of length 10m was to be built across an open ground. The height of the wall is 4m and thickness of the wall is 24m. If this wall is to be built up with bricks whose dimensions are 24cm X 10cm X 8cm, how many bricks would be required?

Please check the solution attached in the image.

The solution given in the ncert solutions of Meritnation is wrong.

No links please.