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# CBSE Class 11-science Answered

a body covers first 1/3 part of journey with velocity 2m/s, next 1/3 part with velocity 3m/s and rest of the journey with velocity 6m/s. find average velocity of the body.
Asked by baljeetdhillon053 | 16 Jun, 2019, 09:03: PM
Average velocity = total displacement/ total time taken
Let the total displacement be s.

Thus, time taken for the first 1/3 part of journey is
= (s/3)/2  =s/6
Time taken for the second part of journey
=(s/3)/3 = s/ 9
Time taken for third part of journey is
= (s/3)/6 = s/18

Thus, total time taken to complete this journey is
=(s/6)+(s/9)+(s/18)
= (s/3) x (6/6) = s/3
Thus, t =s/3

So, average velocity = s/(s/3) = 3 m/s

Thus, average velocity of the body = 3m/s

Answered by Shiwani Sawant | 16 Jun, 2019, 10:32: PM

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