40
A man takes 2 times as long to row a distance upstream as to row the same distance downstream. If the speed of the boat in still water is 9 km/hr, what is the speed of the stream?
Hard
A man takes 2 times as long to row a distance upstream as to row the same distance downstream. If the speed of the boat in still water is 9 km/hr, what is the speed of the stream?
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