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When a body moves with velocity V1 for f...

When a body moves with velocity `V_1` for first half of the journey and `V_2` for remaining half of the journey, its average velocity is given by `2/V_"av"=1/V_1+1/V_2` . If `V_1` and `V_2` are `(15pm0.5)` m/s and `(30pm0.1)` m/s, find the average velocity within error limits.

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