Metal cube

The steel cube has a length of its edge of 5 cm. It is made from steel with a density of 7800 kg/m³. What is the weight of this steel cube?

Correct answer:

m =  0.975 kg

Step-by-step explanation:

$$\begin{gathered} a=5\text{cm} \\ V=a^3=5^3=125{\text{cm}}^3 \\ {V}_2=V\to {\text{m}}^3=V:1000000{\text{m}}^3=125:1000000{\text{m}}^3=0.00013{\text{m}}^3 \\ \rho =7800{\text{kg/m}}^3 \\ m=V_2\cdot \rho =0.0001\cdot 7800=0.975\text{kg} \end{gathered}$$

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