Question

Find the surface area of the figure below. The answer I was given was 48 cm2 but when I multiply the numbers I don’t get the answer, so can someone please do it step by step.

Answer 1

`\stackrel{ \textit{\LARGE Areas} }{\stackrel{ \textit{two triangles} }{2\left[ \cfrac{1}{2}(\underset{b}{3})(\underset{h}{4}) \right]}~~ + ~~\stackrel{ \textit{left rectangle} }{(3)(4)}~~ + ~~\stackrel{ \textit{middle rectangle} }{(3)(3)}~~ + ~~\stackrel{ \textit{right rectangle} }{(3)(5)}} \\\\\\ 12+12+9+15\implies \text{\LARGE 48}~cm^2`