The number of circular pipes with an inside diameter of 1 inch which will carry the same amount of water as a pipe with an inside diameter of 6 inches is `6pi` (b) 12 (c) 36 (d) `36pi`

If the circumference and the area of a circle are numerically equal, then diameter of the circle is (a) pi/2 (b) 2pi (c) 2 (d) 4

A 2cm diameter hose pipe can carry at most 40 liters of water per minute.If a new hose pipe with a diameter equal to 1.5cm is installed,how much water will it carry? If the amount of water that the pipe can hold depends upon the square of the diameter.

If the perimeter of a semi-circular protractor is 36 cm, then its diameter is (a) 10 cm (b) 12 cm (c) 14 cm (d) 16 cm

The circumference of a compact disk with diameter of 5 inches is: (A)10 inches (B) 5 inches (C)15.7 inches (D) 162 inches

A pipe of diameter d can drain a certain water tank in 40 minutes. The time taken by a pipe of diameter 2d for doing the same job in :

If the radius of a circle is increased by 6%, then the area is increased by (a) 6% (b) 12% (c) 12.36% (d) 16.64%

If the diameter of a sphere is 6m ,its hemisphere will have a volume of 18 pi(b)36 pi (c) 72 pi(d) None of these

The inner diameter of a cylindrical wooden pipe is 24cm and its outer diameter is 28cm . The length of the pipe is 35cm. Find the mass of the pipe,if 1cm3 of wood has a mass of 0.6 g.