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\(\frac{3}{4}cm^3=750dm^3\)
\(\frac{30}{100}m^3=300dm^3\)
HT~
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Tóm tắt : 5 công nhân 24 giờ 24m3 => 5 công nhân làm 1 giờ thì được 1 m3
7 công nhân 40 giờ ? m3 => 7 công nhân làm 1 giờ được 1,4 m3 ( tăng 40% )
=> 7 công nhân làm trong 40 giờ ( tức 4 ngày , mỗi ngày 10h ) thì làm được 56m3
Đổi: \(3,06\)tấn \(=30,6\)tạ.
Mỗi mét khối gỗ nặng số tạ là:
\(30,6\div3,6=8,5\)(tạ)
Khối lượng khối gỗ \(2,4m^3\)là:
\(8,5\times2,4=20,4\)(tạ)
Khối gỗ cùng chất có thể tích \(2,4m^3\)nhẹ hơn số tạ là:
\(30,6-20,4=10,2\)(tạ)
\(2144cm^3=0,002144m^3\)
2 144 cm3 = 0,002144 m3