问题 解答题

一块三角形广告牌,底长15m,高8.4m,如果要用油漆刷这块广告牌,每平方米用油漆0.75千克,这块广告牌要用油漆多少千克?

答案

15×8.4÷2×0.75

=63×0.75

=47.25(千克).

答:这块广告牌要用油漆47.25千克.

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