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CBSE Class 9 Answered

An athlete completes one round of a circular track of diameter 49m in 20s. Calculate the distance covered and displacement at the end of 30s.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Time taken to complete one round = 20s

Total time = 30s

Thus, no. of rounds completed = (30/20) = 1.5

Distance covered in 30 s =

Now, in round displacement is zero. In the next half round the displacement of athlete is equal to the diameter of the circular track. Thus, displacement after 30s = 49 m.

Answered by | 04 Jun, 2014, 03:23: PM

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