Wood cuboid

What is the weight of the wood cuboid 15 cm, 20 cm, 3 m if 1 m³ wood weighs 800 kg?

Correct answer:

m =  72 kg

Step-by-step explanation:

$$\begin{gathered} V=0.15\cdot 0.20\cdot 3=0.09 \\ m=800\cdot V=800\cdot 0.09=72\text{ kg} \end{gathered}$$

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