Speed of a boat in still water is 15 km/h. It goes 30 km upstream and returns back at the same point in 4 hours 30 minutes. Find the speed of the stream.
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Speed of boat in still water =15 km/hr
Let x be speed of the stream in km/hr
Speed of the boat upstream =15−x
Speed of the boat down stream =15+x
It is given that the speed of a boat in still water is 15 km/h. Since speed can not be negative, therefore, x = 5. Thus, the speed of the stream is 5 km/h.
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