Question

an athlete completes one round of a circular track of diameter 200 m in 40 seconds. what will be the distance covered and the displacement at the end of 2 minutes 20 seconds

Answer 1

here is your answer may it helps you

Answer 2

Diameter of circular track is 200 m so radius is 100 m than the time is 40 sec and the athlete complete this in 2πr because it is a circle and we know that formula than in 80 sec it will be 2πr and in 120 sec it also again 2πr and in 140 sec it will be πr because in 160 sec an   athlete complete one rounds so in  120 it will be πr only than we add all and we find 7πr than we calculate this 7×22÷7×100 than the distance will be 2200 m and the displacement will be 200 metre because it complete half round and the diameter is 200 m