Calculate 31651

Calculate the surface of a regular 5-sided prism with a base area of 60 dm² if the length of the edge of the lower base is four dm. The height of the prism is 1.3 m.

Correct answer:

S =  380 dm²

Step-by-step explanation:

$$\begin{gathered} S_1=60{\text{dm}}^2 \\ a=4\text{dm} \\ h=1.3\text{m}\to \text{dm}=1.3\cdot 10\text{dm}=13\text{dm} \\ n=5 \\ {S}_2=a\cdot n\cdot h=4\cdot 5\cdot 13=260{\text{dm}}^2 \\ S=2\cdot S_1+S_2=2\cdot 60+260=380{\text{dm}}^2 \end{gathered}$$

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