Question
A boy can swim a certain distance downstream in 4 hours
and return in 5 hours. If the rate of stream is 3 kmph then what is the speed of boy in still water?Solution
Let the speed of the boy in still water be x kmph. Then, (x + 3) × 4 = (x – 3) × 5 => 4x + 12 = 5x - 15 => x = 27 kmph
More Boats and streams Questions
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(72 × 52 + 1555 )/(79+60) = 2000 ÷ ?
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143 + 14.3 + 1.43 + 0.143 + 0.0143 =?
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{12.75 × √64 + 13.5 × √(√256)} ÷ 6 + 49.5 ÷ 5.5Â
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40% of 150 - ?% of 75 = 15 × 1.6
Determine the value of ‘x’ if x% of 500 plus {1250 ÷ x of 10} × 5 equals 130
(3/7) x 868 + 25% of 240 = (? + 65)
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