The interior of building is in the form of a cylinder of diameter 4m and height 3.5m ,surmounted by a cone of the same base with vertical angle as a right angle. Find the surface area (curved) and volume of the interior of the building.

The radius of cone and cylinder(r) = 2 m

Height of cylinder(h) = 3.5 m

Height of cone = Radius of cone = 2 m (As the vertical angle is right angle)

So the slant height of the cone is

So the curved surface area of the building

Volume of the building is

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