1楼哈哈爸
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发表于 2009-4-19 09:53
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求助数学题
Teams X and Y work separately on two different projects.
On sunny days, team X can complete the work in 12 days
while team Y needs 15 days.
On rainy days, team X’s efficiency decreases by 50%
while team Y’s efficiency decreases by 25%.
Given that the two teams started and ended the projects at the same time,
how many rainy days are there?.
