The excursion boat on the river takes 2.5h; hours to make th

学习 时间:2026-04-07 18:09:23 阅读:144
The excursion boat on the river takes 2.5h; hours to make the trip to a point 12 miles upstream and to return.If the rate at which the boat travels in still water is 5 times the rate of the river current,what is the rate of the current?

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缓慢的楼房

缓慢的芒果

2026-04-07 18:09:23

设 the rate of the current is v,则 the rate of the boat travels is 5v,有12/(4v)+12/(6v)=2。5,v=2

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  • 留胡子的月饼
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    2026-04-07 18:09:23

    设 the rate of the current is v,则 the rate of the boat travels is 5v,有12/(4v)+12/(6v)=2。5,v=2

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