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需要三合土；40×60×0.1=240m³
需要煤渣；40×60×0.04=96m³
答；需三合土,煤渣各240m³和96m³.
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学校修一个60米,宽40米的长方形操场,先铺10厘米厚的三合土,再铺4厘米厚的煤渣.需三合土,煤渣各多少米?
学校修一个60米,宽40米的长方形操场,先铺10厘米厚的三合土,再铺4厘米厚的煤渣.需三合土,煤渣各多少米?
数学人气：885 ℃时间：2019-10-23 07:32:54
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