A man can row 30 km downstream and 20 km upstream in 4 hours. He can row 45 km downstream and 40 km upstream in 7 hours. Find the speed of man in still water?

A man can row 30 km downstream and 20 km upstream in 4 hours. He can

1.	A man can row 30 km downstream and 20 km upstream in 4 hours. He can row 45 km downstream and 40 km upstream in 7 hours. Find the speed of man in still water?
A.	15 kmph
B.	10 kmph
C.	12 kmph
D.	12.5 kmph
E.	None of these
Answer» E. None of these

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A man can row 30 km downstream and 20 km upstream in 4 hours. He can row 45 km downstream and 40 km upstream in 7 hours. Find the speed of man in still water?

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