Question

The diameter of the wheel of a car is 77cm. How many revolution will it make to travel 121 km

Answer 1

hope it will help
50000 revolutions is the answer

Answer 2

121km = 12100000cm
diameter = 77cm
Radius = 77/2 cm
circumference = 2*22/7*77/2
= 242 cm
one revolution = 242 cm
no of revolution made in 12100000cm
= 12100000/242
= 50000