Mathematics, 26.04.2020 01:35 george27212

A starts to walk from P to Q half an hour after B. He overtakes B midway between P and Q and arrives at Q at 2pm. After resting for 7 1/2 minutes, he starts back and meets B after 10 more minutes. When did A start from P? Assume each walks at a constant rate.

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A starts to walk from P to Q half an hour after B. He overtakes B midway between P and Q and arrives...