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2024-05-05 11:09:22
câu a)
thể tích hội trường :
\(8.5\cdot7\cdot4=238\left(m^3\right)\)
80% của hội trường :
\(238\cdot\dfrac{80}{100}=190.4\left(m^3\right)\)
Số người tại Hội trường :
\(190.4\cdot5.6=34\left(người\right)\)