Asked by  | 12th Jun, 2008, 06:50: PM

Expert Answer:

assume the distance b\w the place is x m,.

calculate the time tin  terms of x for for first trip

calculate the time t2 in terms of x for the back trip

now use the formula average speed = total distance (which is 2 x)        / total time (which is sum of t1  and t2 )

Answered by  | 12th Jun, 2008, 07:35: PM

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