Question

A wheel 14 cm in diameter makes 3000 revolutions per minute. Find its speed in m/s.

Answer 1

Radius of wheel=14/2
                          =7 cm

Circumfrence=2πr
                      =2(22/7)7
                      =44 cm
                      =44/100 m
Rotations per second=3000rotations/60seconds
                                  =50 rotations per second
speed=distance/time
          =[50*(44/100)]/sec
Speed=22m/s

The speed is 22 m/s