Question

the wheels of a car are of diameter 70cm. how many complete revolutions does each wheel make in one minute when the is travelling at a speed of 52.8km per hour? ​

Answer 1

Answer:

speed of car = 52.8km/h = 52.8/60 km/min

distance traveled in one minute = 52.8/60 km = 0.88 km = 88000 cm

circumference of wheel = π×70cm = 22/7 × 70cm = 220cm

number of complete revolutions = 88000cm/220cm = 400