一輛船往返于A和B之間.從A到B 順流,從B到A是逆流.如果我們知道他的靜水速度是20公里/小時(shí),從A到B需要6小時(shí),但是,從B到A本船舶需要1.5倍的從A到B的時(shí)間.你能知道水流速度嗎?
上面的人真是瞎搞,隨便找個(gè)翻譯軟件.這么簡單的問題還給了這么多冗余條件還不會?
速度比等于時(shí)間反比：（20+v）：（20-v）=1.5
解得v=4
英文數(shù)學(xué)題☆HELP★~~~~~~~~~~~（還會加分!）
英文數(shù)學(xué)題☆HELP★~~~~~~~~~~~（還會加分!）
A ship sails out and home(往返）between places A and B.From A to B,it is fair current,From B to A it is reverse current .if we know the speed of this ship in still water is 20km/h.and it takes this ship 6h to sallfrom A to B,however, from B to A this ship takes 1.5times as long as the time from A to B.Can you know the flowing water speed?
Thank you !
有翻譯（+5分）
有過程（+10分）
A ship sails out and home(往返）between places A and B.From A to B,it is fair current,From B to A it is reverse current .if we know the speed of this ship in still water is 20km/h.and it takes this ship 6h to sallfrom A to B,however, from B to A this ship takes 1.5times as long as the time from A to B.Can you know the flowing water speed?
Thank you !
有翻譯（+5分）
有過程（+10分）
其他人氣：388 ℃時(shí)間：2020-05-19 14:38:49
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