Question

A vehicle travel half the distance L with speed v1 and v2 and other half with speed v2 than average speed

Answer 1

Answer:

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Formula for average speed=total distance/total timeLet distance traveled =Dtime taken in completing first half distance=D/2(v1).time taken to complete second half distance=D/2v2.so total time taken =D/2v2 + D/2v1 =D(v1+v2)/2v1v2.so average speed=D/[D(v1+v2)/2v1v2]=2v1v2/(v1+v2).

Explanation:

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