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- 精华
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- 积分
- 2450
- 经验
- 2450 点
- 威望
- 264 点
- 金钱
- 244 ￥
- 魅力
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prep数学ps题
Working alone at its own constant rate, a machine seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours.If the two machines, each working at its own constant rate and for the same period of time, together sealed a certain number of cartons, what percent of the cartons were sealed by the machine working at the faster rate?
题目问的问题不太明白什么意思 |
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