The diamater of a shot-put made of brass is 14 cm. If 1 `cm^3` of brass has mass 9 g, find the mass of the shot-put.

A shot-putt is a metallic sphere of radius 4.9 cm. If the density of the metal is 7.8 g per cm^3 , find the mass of the shot-putt.

The diameter of a metallic ball is 42 cm. What is the mass of the ball, if the metal weighs 8.9 g per cm^3 ?

The height of a cone is 15 cm. If its volume is 1570 cm^3 , find the radius of the base. (Use pi = 3.14)

A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, given that 1 cm^3 of iron has approximately 8 g mass. (Use pi = 3.14)

A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, give that 1 cm^3 of iron has approximately 8g mass. (Use pi = 3.14)

A cylindrical road-roller made of iron is 1 m long. Its internal diameter is 54 cm and the thikcness of the iron sheet used in making the rolleris 9cm. Find the mass of the roller, if 1 cm^3 iron has 7.8 g mass. (Use pi = 3.14)

The thicknes of a metallic tube is 1 cm and the inner diameter of the tube is 12 cm. Find the mass of 1 m long tube, if the density of the metal be 7.8 g//cm^3 .

From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet. (Takepi = 3.14)