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自来水公司未来鼓励居民节约用水，规定每户每月用水10吨以内的（含10吨），每吨按4.5元收费；超过10吨的，超出部分按每吨5.5元收费．王阿姨家6月份交水费78元，王阿姨家用了多少吨水？
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为鼓励居民节约用水自来水公司规定每户每月用水10吨以内含10吨按每吨2.5元收费超过10吨的其超出的
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为鼓励居民节约用水自来水公司规定每户每月用水15吨以内含15吨按每吨1.2元收费超过15吨的其超出部
为鼓励居民节约用水自来水公司规定每户每月用水15吨以内含15吨按每吨1.2元收费超过15吨的其超出的
为鼓励居民节约用水自来水公司规定每户每月用水15吨以内含15吨按每吨1.2元收费超过15吨的其超过
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为鼓励居民节约用水自来水公司规定每户每月用水15吨以内含15吨按每吨1.2元收费超过15吨的超出的吨
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为鼓励居民节约用水自来水公司规定每户每月用水15吨以内含15吨按1.2元一吨收费超过15吨的其超出
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某市为了鼓励居民节约用水自来水公司规定每户用水15吨以内含15吨按每吨3.5元收费超过15吨的其超
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