Mathematics, 07.04.2020 07:09 Adreanna1018

A boat whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is

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A boat whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 h...

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