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Question
The time taken by a boat to travel 13 km downstream is the same as time taken by it to travel 7 km upstream. If the speed of the stream is 3 km/h, then how much time (in hours) will it take· to travel a distance of 44.8 km in still water?
Options
`4 13/25`
`5 2/5`
`5 3/5`
`4 12/25`
MCQ
Solution
`4 12/25`
Explanation:
`13/((x + 3)) = 7/((x - 3))`
`13x - 39 = 7x + 21`
`6x = 60`
`x` = 10 kmph
t = `44.8/10 = 4 12/25` hour
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Boats and Streams (Entrance Exam)
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