Question
A boy can swim a certain distance downstream in 2 hours
and return in 3 hours. If the rate of stream is 4 kmph then what is the speed of boy in still water? TYPE 6Solution
Let the speed of the boy in still water be x kmph. Then, (x + 4) × 2 = (x – 4) × 3 => 2x + 8 = 3x - 12 => x = 20 kmph
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