Question

4. A bicycle wheel, diameter 56 cm, is making
45 revolutions in every 10 seconds. Calculate
the speed, in kilometre per hour, of the
bicycle.​

Answer 1

Answer:

Circumference of the wheel = 2pi r = 22/7 * 28*2 = 176 cm = 1.76 m

It is making 45 revolutions every 10 seconds. So, Speed of cycle in m/s = 1.76*45/10 = 7.92 m/s

Speed in km/h = 7.92*3.6 = 28.512 km/h