Mathematics, 06.11.2020 20:10 miner12924owhu4d

The speed of a boat in still water is 10 km/hr. If it can travel 78 km downstream and 42 km upstream in the same time, the speed of the stream is?

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The speed of a boat in still water is 10 km/hr. If it can travel 78 km downstream and 42 km upstream...

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