Mathematics, 05.07.2019 05:00 Jwelch4171

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