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

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 a carriage is 91 cm in diameter and makes 5 revolutions per second. How fast is the carriage running ?

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)?

A railway wheel of diameter 4 ft makes 6 revolutions per second. Find the speed of the train [ pi=3.14] .