Question

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

Answer 1

Hey friend...!!!

Diameter = 77 cm
So, radius = 77/2 = 38.5 cm
Circumference = 2 × 22/7 × 38.5
= 242 cm
So, number of revolutions in 121 km
= 121 km = 121000cm
So, 121000/242
= 500 revolutions

Hope it helps...!!! ¶¶¶