某工厂食堂的第三季度一共节煤7400斤其中八月份比七月份多节约0.2,九月份比八月份多节约0.25,问该厂九月份节约多烧煤
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解决时间 2021-04-30 00:25
- 提问者网友:蓝琪梦莎
- 2021-04-29 20:38
某食堂一共节煤7400斤其中八月份比七月份多节约0.2,九月份比八月份多节约0.25,问该厂九月份节约多烧煤
最佳答案
- 五星知识达人网友:舊物识亽
- 2021-04-29 21:25
7400÷(1+(1+0.2)+(1+0.2)×(1+0.25))×(1+0.2)×(1+0.25)
=7400÷(1+(1+0.2)+(1+0.2)×(1+0.25))×(1+0.2)×1.25
=7400÷(1+(1+0.2)+(1+0.2)×(1+0.25))×1.2×1.25
=7400÷(1+(1+0.2)+(1+0.2)×1.25)×1.2×1.25
=7400÷(1+(1+0.2)+1.2×1.25)×1.2×1.25
=7400÷(1+1.2+1.2×1.25)×1.2×1.25
=7400÷3.7×1.2×1.25
=3000
该厂九月份节约3000斤煤
=7400÷(1+(1+0.2)+(1+0.2)×(1+0.25))×(1+0.2)×1.25
=7400÷(1+(1+0.2)+(1+0.2)×(1+0.25))×1.2×1.25
=7400÷(1+(1+0.2)+(1+0.2)×1.25)×1.2×1.25
=7400÷(1+(1+0.2)+1.2×1.25)×1.2×1.25
=7400÷(1+1.2+1.2×1.25)×1.2×1.25
=7400÷3.7×1.2×1.25
=3000
该厂九月份节约3000斤煤
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