# An athlete completes one round of a circular track of radius R in 40 sec. What will be his displacement at the end of 2 min 20 seconds?

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Total time duration in consideration : 2 min 40 secs = 160 secs

No of complete rounds in this time = 160/40 = 4 rounds

Therefore he will be exactly at the point where he started. Hence**his displacement will be 0**, although he will cover a distance of 4 (2πR)

No of complete rounds in this time = 160/40 = 4 rounds

Therefore he will be exactly at the point where he started. Hence

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2 min 20 second = 140 second.

he completed one round in 40 second.

in 140 second, he will cover= 140/40=3.5 round.

after 3.5 round, he would be on the opposite side of the starting point.

So the displacement will be the diameter or 2R.

he completed one round in 40 second.

in 140 second, he will cover= 140/40=3.5 round.

after 3.5 round, he would be on the opposite side of the starting point.

So the displacement will be the diameter or 2R.