Question

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

Answer 1

Answer:

50000  revolutions

Step-by-step explanation:

Let the number of revolutions be x.

x* Circumference of wheel= Area covered

x*2Πr=121 km

x*2*22/7*77/2=12100000cm

x*44*77/14=12100000

x*3388/14=12100000

x*242=12100000

x=50000

Hence, the wheel of the car has to take 50,000 revolutions to cover an area of 121 km.