Question

An athelete completes one round of a circular track of diameter 49 m in 20 s . calculate the distance covered and displacemant at the end of 30 s

Answer 1

Distance = Circumference of the circular track
               = 2 r
               = 2 * 22/7 * 49/2
               = 154 m
And Displacement = 1/2 of distance that is 77 m  :-)