Question

the wheels of a car are of diameter 80cm how many complete revolutions does each wheel make in 10 min when car is travelling at speed of 66km/h?

Answer 1

Distance covered in 10 minutes = 660km
= 660x1000x100
=66000000cm
now circumference=2πr=πd=π80cm

now no. of revolutions
=66000000/80x22/7
=4375