The wheel of a railway carriage is 40cm in diameter and makes 6 revolutions in a second, how fast is the train going?

The wheel of a railway carriage is 4 ft in diameter and makes 6 revolution per second, how fast is the trains going? (pi=3.14)

The wheel of a railway carriage is 40 cm in diameter and makes 7 revolutions in a second, find the speed of train.

The wheel of an engine of 300 cm in circumference makes 10 revolutions in 6 seconds. What is the speed of the wheel (in km/h)?

If the wheel of the engine of a train 4(2)/(7) metres in circumference makes 7 revolutions in 4 seconds,then the speed ( in km/hr) of the train is (a) 27 (b) 28 (c) 29 (d) 30

The wheels of the locomotive of a train are 2.1 m in radius. They make 75 revolutions in one minute. Find the speed of the train in km per hour.

A bicycle wheel of radius 35cm is making 25 revolutions in 10 seconds.At what speed in km/hr is the cycle moving ? A bicycle wheel makes 5000 revolutions in moving 22km. Find the diameter of the wheel.