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60. A person travel along a straight road for the first half length with a constant speed v1 and for the second half length with a constant speed v2.calculate the average speed of the person during his journey. |
| Answer» 60. A person travel along a straight road for the first half length with a constant speed v1 and for the second half length with a constant speed v2.calculate the average speed of the person during his journey. | |