樓主,這個(gè)3.750應(yīng)該是3,750=3750吧?
整個(gè)題目的意思是：
一容積為3750立方英尺的水池,現(xiàn)在打開注水閥以800立方英尺/分的速度注水,同時(shí),打開放水閥以300立方英尺/分的速度放水,問：需要多長(zhǎng)時(shí)間才能把水池注滿?
設(shè)需要x分鐘
800X-300X=3750
X=7.5
每個(gè)單詞都認(rèn)識(shí),
每個(gè)單詞都認(rèn)識(shí),
how many minutes willit take to completely fill a water tank with a capacity of 3.750cubic feet if the water is being pumped into the tank at the rate of 800 cubic feet per minute and is being drained out of the tank at the rate of 300cubic feet per minute
how many minutes willit take to completely fill a water tank with a capacity of 3.750cubic feet if the water is being pumped into the tank at the rate of 800 cubic feet per minute and is being drained out of the tank at the rate of 300cubic feet per minute
英語人氣：820 ℃時(shí)間：2020-05-24 18:33:51
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