Two boats X and Y start towards each other from two places, 155 km apart. Speed of the boat X and Y in still water are 14 km/hr and 17 km/hr respectively. If X proceeds down and Y up the stream, they will meet after.
Let the speed of the stream be x km/hr and both the boats meet after t hours According to the question, ⇒ (14 + x) t + (17 – x) t = 155 ⇒ 14t + 17t = 155 ⇒ 31t = 155 ⇒ t = 155/31 = 5 hours
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