Question
If the sum of upstream and downstream speed is 24 km/hr
and the speed of the current is 5 km/hr, then find the approximate time taken to cover 36 km downstream?Solution
Let the speed of the boat in still water be x km/hr. According to the question, => x + 5 + x - 5 = 24 => 2x = 24 => x = 12 Downstream speed = 12 + 5 = 17 km/hr Required time = 36/17 = 2.12 hrs, which rounds to approximately 2 hrs
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