It takes 13.5 mL to paint the surface of the circular sheet of radius 17 cm . How much paint is required to paint a similar circular sheet with double the radius ?

Find the surface area of circular sphere having radius 7 cm.

Find the radius of a circular sheet whose area is 5544 m^(2)

How much metal sheet is required to prepare a cylindrical pipe 10 cm long and radius 7 cm?

If requires 90 g paint for painting a door 12 cm xx 9 cm , how much paint is required for painting a similar door 4 cm xx 3 cm ?

A 400 kg satellite is in a circular orbite of radius 2R around the earth how much energy is required to transfer it to circular orbit of radius 4R

The thickness of a cylinder is 1 foot, the inner radius of the cylinder is 3 feet and height is 7 feet. To paint the inner suface it requires one litre of a particular colour . How much quantity of the same colour is required to paint all the surfaces of the cylinder?

The force required to take away a flat circular plate of radius 4 cm from the surface of water is

Find the area of the iron sheet required to prepare a cone 20 cm high with base radius 21 cm.