Mathematics, 27.08.2020 22:01, lilagvaldez15

A boat whose speed is 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 is ___ km/hr.

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