Mathematics, 07.04.2021 18:30 corbeansbrain
the speed of a boat in still water is 15 km/hr. it needs four more hours to travel 63 km against the current of a river than it needs to travel down the river. determine the speed of the current of the river.​
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the speed of a boat in still water is 15 km/hr. it needs four more hours to travel 63 km against the...
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