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[Problem Solving]

试题详情

题目:

Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days?

选项:

A、2
B、3
C、4
D、6
E、8

答案:

B

提问:

不知道怎么做

解答:

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阅读836
解答: 徐小梅

提问:

不知道怎么做

解答:

点赞0
阅读837
解答: 徐小梅老师

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