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38.If a person covers first half of the total journey with a speed of 20m/s and in the rest of the half he covered first half of the period with 25m/s and next half period with 15m/s.Find the average speed in his total journey. |
| Answer» 38.If a person covers first half of the total journey with a speed of 20m/s and in the rest of the half he covered first half of the period with 25m/s and next half period with 15m/s.Find the average speed in his total journey. | |