a person travelling on a straight line without changing its direction moves with a uniform speed v1 for half distance and next half distance he covers with uniform speed v2 find average speed
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avg. speed= (s+s)/(t1+t2)
= 2s/[(s/v1)+(s+v2)]
= (2v1v2)/(v1+v2)
= 2s/[(s/v1)+(s+v2)]
= (2v1v2)/(v1+v2)
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Answer:answer is 2(v1)(v2)/(v1+v2)
Full Explanation:Given in pic :)
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