Question

The diameter of a wheel of cycle is 14 cm. if the will takes 10 minutes to make 500 Revolution find its speed in metre per second and kilometre per hour

Answer 1

radioisotope of
wheel= 14/2=7cm
For 1 revolution, it moves 2×22/7×7=44cm
for 500 revolution, it moves 500×44cm=22000cm
=220m=0.22km
the wheel moves, in 10 min 0.22km
in 60 mins, it moves 0.22×6=1.32km
speed=1.32km/h
also,speed=1.32×5/18=110/3 m/s