Question

a person runs a circular path of radius 21m in 44 second then find the speed in km/hr

Answer 1

Circumference of Circular path= 2 pie *r
=2*21*pie
=2*21*22/7
=308m
Using the formula,
Speed= Distance/Time, we get
Speed=308/44
=7m/s
=25.2km/h