Fill the pool with 10000cm3 of water. It will take 8 hours for A alone to complete the task, and if AB can work together, it will take 6 hours. What is the rate of B working alone?
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A1250$$cm^3 $$ /h
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B2000/3 $$cm^3 $$/h
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C2000/7 $$cm^3 $$/h
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D1200$$cm^3 $$/h
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E1250/3 $$cm^3 $$/h
显示答案
正确答案: E