Surface Areas a...

A spherical ball made of iron has diameter 6 cm. If density of iron 8g/$$\displaystyle cm^{3} $$ then mass of the ball is nearly (use $$\displaystyle \pi =3.142 $$)

Total surface area of a cube of 2 centimetre side is 

A right circular cylinder and a sphere are of equal volumes and their radii are also equal If h is the height of the cylinder and d is the diameter of the sphere then

Three solid spheres of a lead are melted into a single solid sphere If the radii of the three spheres be 1 cm, 6 cm and 8 cm respectively Then radius of the new sphere is :

The surface areas of the two spheres are in the ratio $$1:2$$. The ratio of their volumes is 

The volume of a right circular cylinder is 1100 $$\displaystyle cm^{3} $$ and the radius of its base is 5 cm. The area of its curved surface is

If the radius of the base of a cylinder is $$2$$ cm and its height $$7$$ cm, then what is its curved surface area?

A sphere of diameter $$10$$ cm weighs $$44$$ kg. The weight of a sphere of the same material whose diameter is $$6$$ cm is

Find the volume of a hemisphere of radius $$6.3 \ cm$$ ($$\displaystyle \pi =22/7$$)

How many spherical bullets can be made out of a solid cube of lead whose edge measures 44 cm if each bullet has radius 2 cm?