a wheel of a bicycle has a diameter of 70cm and is rotating at the rate of 200 revolutions per minute calculate the speed of the bicycle in km/hour

Answer 1

diameter of wheel = 70π cm
distance covered in 1 minute = 200(70π)= 14000π cm/min
= 14000π(60/100000) km/h , (100,000 cm in 1 km and 60 min in 1 hour)
= 26.4 km/h