City a to city b is a downstream journey on a stream which flows at a speed of 5km/hr. Boats p and q run a shuttle service between the two cities that are 300 kms apart. Boat p, which starts from city a has a still-water speed of 25km/hr, while boat q, which starts from city b at the same time has a still-water speed of 15km/hr. When will the two boats meet for the first time? (this part is easy) when and where will they meet for the second time
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Answer:
a....t1 = 7.5 hr
b....1...200 Km from A
2....45 hr from start or 37.5 hr after first meet
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