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a vehicle travels half the distance l with speed v1 and the other half with speed v2 then its average speed is - solution |
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Answer» FORMULA for AVERAGE speed=total distance/total time Let distance traveled =D time 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). |
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