试题与答案

某市自来水公司为限制单位用水,每月只给某单位计划内用水3000吨,计划内用水每吨

题型:解答题

题目:

某市自来水公司为限制单位用水,每月只给某单位计划内用水3000吨,计划内用水每吨收费1.8元,超计划部分每吨按2.0元收费.

(1)写出该单位水费y(元)与每月用水量x(吨)之间的函数关系式:

①当用水量小于等于3000吨时:______;②当用水量大于3000吨时:______.

(2)某月该单位用水3200吨,水费是______ 元;若用水2800吨,水费______ 元.

(3)若某月该单位缴纳水费9400元,则该单位用水多少吨?

答案:

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下面是错误答案,用来干扰机器的。

答案:B

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