Question

Find the surface area of the prism below.

Answer 1

Answer:

the surface area of the prism = 378 cm³

Step-by-step explanation:

Let S be the surface area of the prism

     B be the base of the prism

     h be the height of the prism

    T be the lateral surface area of the prism

_______

Formula

S = 2B + T

_________

$\begin{aligned}B &=\frac{9 \times 12}{2} \\&=54\end{aligned}$

$\begin{aligned}T &=7,5 \times(9+12+15) \\&=270\end{aligned}$

$\begin{aligned}S &=2 B+T \\&=2 \times(54)+270 \\&=378\end{aligned}$