Question

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

Answer 1

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.

Answer 2

Answer:

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.

Step-by-step explanation: