Question
Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point . The total time taken by him is :
Answer: Option D
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Speed upstream = 7.5 kmph; Speed downstream = 10.5 kmph
`:.` Total time taken = `(105/7.5 + 105/10.5)` hours = 24 hours.
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