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Let, the speeds of boat ‘A’ and boat ‘B’, in still water and the speed of the current be 11x km/hr, 5x km/hr and 2x km/hr, respectively. According to the question, (9D – 26)/(11x + 2x) = (D + 50)/(5x – 2x) Or, 27D – 78 = 13D + 650 Or, 14D = 728 Or, D = 52
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