Calculate

Calculate the surface of a regular quadrilateral prism whose base edge is 2.4dm and the height of the prism is 38cm.

Correct answer:

S =  4800 cm²

Step-by-step explanation:

$$\begin{gathered} a=2.4\text{ dm}\to \text{ cm}=2.4\cdot 10\text{ cm}=24\text{ cm } \\ c=38\text{ cm } \\ S=2\cdot a^2+4\cdot a\cdot c=2\cdot 24^2+4\cdot 24\cdot 38=4800{\text{cm}}^2 \end{gathered}$$

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