Question

A man can row 25 km upstream and 45 km downstream in 5 hours. He can also row 27 km upstream and
39 km downstream in 6 hours. What is the speed of the man in still water? (in kmph)
1) 11 7/5
2) 13 5/7
3) 9 3/7
4) 14 277
5) None of these
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Answer 1

Answer:

The correct option is 3

And the correct answer is 93/7