Perimeter 64974

The prism has a square base with an edge 5 cm long and 20 cm high. Calculate it:
(a) the area of the base
b) the perimeter of the base
c) volume
d) surface

Correct answer:

S₁ =  25 cm
o =  20 cm
V =  500 cm³
S =  450 cm²

Step-by-step explanation:

$$\begin{gathered} a=5\text{cm} \\ h=20\text{cm} \\ {S}_1=a^2=5^2=25\text{cm} \end{gathered}$$

$o=4\cdot a=4\cdot 5=20\text{cm}$

$V=S_1\cdot h=25\cdot 20=500{\text{cm}}^3$

$$\begin{gathered} S_2=o\cdot h=20\cdot 20=400{\text{cm}}^2 \\ S=2\cdot S_1+S_2=2\cdot 25+400=450{\text{cm}}^2 \end{gathered}$$

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