A boy to his school at distance 6km with speed 2.5 km/hr & walk back with speed 4 km /hr . find avarage velocity.
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avg speed=2xy/x+y
2×2.5×4/2.5+4
5×4/6.5
20/6.5
3.07kmph is answer obtained
2×2.5×4/2.5+4
5×4/6.5
20/6.5
3.07kmph is answer obtained
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