Abdul,while driving to school,computes the average speed for his trip to be 20km h^-1 .on his return trip along the same route .there is less traffic and the average speed is 30km h^-1 .what is the average speed for Abdul's trip ?
Plz guys answer it fast ...and correctly and you try make answer in a copy plzzz
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46264i3134880413525855737504669068hshvdt445735733
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