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Start learning 50% faster. Sign in nowLet the speed of the stream be ‘x’ km/hr Therefore, speed of the boat in still water = 6.5x km/hr Upstream speed of the boat = 6.5x – x = 5.5x km/hr Downstream speed of the boat = x + 6.5x = 7.5x km/hr According to the question, 7.5x – 5.5x = 24 => 2x = 24 => x = 12 Therefore, upstream speed of the boat = 5.5x = 66 km/hr Required time taken = 330/66 = 5 hours
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