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A body covers first half of journey at a speed 40m/s and second half at a speed 60m/s.Calculate average speed. |
Average speed is total distance divided by total time. First half,time is d/40 Second half,time is d/60 Total time is d/40 + d/60 = d/24 Total distance is 2d Average speed is 2d/(d/24) = 48m/s. |
