The number of coins, each of radius 0.75 cm and thickness 0.2 rightcm, to be melted to make aright circular cylinder of height 8 cm and base radius 3 cm is

If the capacity of a cylindrical tank is 1848 m³ and the diameter of its base is 14 m, the depth of the tank is

The ratio of the total surface area to the lateral surface area of 20 cm and height 60 cm, is

66 cm³ of silver is drawn into a wire 1 mm in diameter. The length of the wire will be

The height of a cylinder is 14 cm and its diameter is 10 cm. The volume of the cylinder is