The diameter of a circular wheel is 1.4 m. How many revolutions will it make in travelling 22 km?

Correct option is A

Given:
Diameter = 1.4 m, Distance = 22 km
Formula Used:
Number of revolutions = Distance / Circumference
Solution:
Circumference = 2πr =π × (2r)=  π × 1.4 = 4.4 m
Number of revolutions = 22000 / 4.4 = 5000