a motor vehicle drive from A to B with a uniform speed of 30 km /hr and returns from B to A with a uniform speed of 20 km/hr . find the average speed?
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Answer:
24kmph
Explanation:
average speed = 2v1v2/v1+v2
given v1=30kmph
v2=20kmph
average speed=2(30)(20)/30+20
=1200/50
=24kmph
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