Question

The area of one of the bases of the figure shown above is about 15.6 cm?What is the surface area, in cm2, of the figure? Round your answer to thenearest tenth.

Answer 1

The surface area of the figure will be the area of the bases plus the area of the lateral faces, so:

$\begin{gathered} SA=2B+3LA \\ where\colon \\ B=15.6 \\ LA=6\cdot3=18 \\ so\colon \\ SA=2(15.6)+3(18) \\ SA=31.2+54 \\ SA=85.2cm^2 \end{gathered}$