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In every 26 min, water comes in boat = 31/3 tonnes So in 1 min, water comes in boat = 31/(3*26) tonnes So in 1 hr, water comes in boat = 31*60/(3*26) = 310/13 tonnes and water thrown in 1 hr = 13 tonnes So final water comes in 1 hr = (310/13) - 13 = (310-169)/13 = 141/13 tonnes So it will sink overall in = 94/(141/13) = 26/3 hours So now (x+14) * 26/3 = 156 (as both are in opposite direction, let speed of ship be x kmph) x+14 = 18 x = 4 kmph Speed of ship = 4kmph
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