A man can row 30 km upstream and 44 km downstream in 10 hours. Also, he can row 40 km upstream and 55 km downstream in 13 hours. Find the rate of the current and the speed off the man in still water.

(a) 1 km/h
(b) 2 km/h
(c) 3 km/h
(d) 4 km/h
(e) None of these


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