Question

an athlete completes one round of a circular track of diameter 200 m in 40 seconds what will be the distance and displacement speed and velocity after 2 minutes 20 seconds ​

Answer 1

d=200m,t=40s, r=100m

In 40sec,an athlete completes 1 round.

In 140 sec,an athelete completes 140/40=3 whole 1/2rounds

hence,

the distance covered by athelete

3×2πr÷1/2×2πr

3×2×22/7×100+1/2×2×22/7×100=2200m

Displacement=2r=200m