# Q 1.     An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 20 s?

Given, Diameter of the circular track =

The circumference of the circular track,

The athlete completes one round of a circular track in 40 s.

Speed of the athlete =

In ,

Distance travelled by the athlete =

Also, number of rounds the athlete will complete in  =

Therefore, the final position of the athlete after  will be diametrically opposite to his initial point.

(3 complete rounds and one half round.)

Hence, displacement of the athlete = magnitude of diameter of the circle =

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