The body

The body has dimensions of 2m, 2dm, and 10 cm. It weighs 28 kg. What is its density?

Correct answer:

h =  700 kg/m³

Step-by-step explanation:

$$\begin{gathered} a=2\text{ m } \\ b=2\text{ dm}\to \text{ m}=2\mathrm{/}10\text{ m}=0.2\text{ m } \\ c=10\text{ cm}\to \text{ m}=10\mathrm{/}100\text{ m}=0.1\text{ m } \\ m=28\text{ kg } \\ V=a\cdot b\cdot c=2\cdot 0.2\cdot 0.1={\displaystyle \frac{1}{25}}=0.04{\text{m}}^3 \\ h=m\mathrm{/}V=28\mathrm{/}0.04=700{\text{kg/m}}^3 \end{gathered}$$

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