CBSE Class 9 Answered
Poblem..........
Asked by | 12 Jun, 2008, 06:50: PM
Expert Answer
assume the distance b\w the place is x m,.
calculate the time t1 in 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 | 12 Jun, 2008, 07:35: PM
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