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Downstream speed = 39/3 = 13 km/hr Upstream speed = 39/13 = 3 km/hr So speed of boat in still water = (13 + 3)/2 = 8 km/hr
A boat covers 45 km downstream in 2 h and the same distance upstream in 10 h. Find the speed (in km/h) of the boat in still water.
A man can row one quarters of a kilometer against the stream in 30/4 minutes and return in 5/2 minutes. The speed of the man in still water is:
Speed of boat is 10 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 54 km downstream?
A man can row his boat with the stream at 14 km/h and against the stream in 8 km/hours. Find the rate of the stream.
