甲乙距离看做1
则顺流适度是1/14
逆流是1/20
所以水流速度是 （1/14-1/20）÷2=3/280
所以要1÷3/280=93又3分之1小时
一艘轮船在甲乙两个码头之间航行,从甲到乙顺流而下要14小时,从乙到甲逆流而上需要20小时.
一艘轮船在甲乙两个码头之间航行,从甲到乙顺流而下要14小时,从乙到甲逆流而上需要20小时.
如果将一块木板放在甲码头的水中,它从甲码头飘到乙码头需要多少小时?
如果将一块木板放在甲码头的水中,它从甲码头飘到乙码头需要多少小时?
数学人气：705 ℃时间：2019-10-14 21:39:38
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