问题 解答题

某租车公司拥有汽车100辆,当每辆车的月租金为3000元时,可全部租出,当每辆车的月租金每增加60元时,未租出的车将会增加一辆.租出的车每月需要维护费160元,未租出的车每月需要维护费60元.

(Ⅰ)当每辆车的月租金定为3900元时,能租出多少辆车?

(Ⅱ)当每辆车的月租金为多少元时,租车公司的月收益最大?最大月收益是多少?

答案
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