Question

the area of one of the bases of the above figure us about 10.8 cm square the surface area of the figure is

Answer 1

Given

Area of base = 10.8 square cm

Length of prism = 11 cm

Find

Surface area of the triangular prism

Step-by-step explanation

As we know the surface area of triangular prism is given by

perimeter of base * length of figure + 2(Area of base)

now , we find perimeter of base

perimeter = sum of all sides = 5 + 5 + 5 = 15 cm

so, surface area =

`\begin{gathered} 15*11+2*10.8 \\ 165+21.6 \\ 186.6cm^2 \end{gathered}`

Final Answer

Therefore , the correct answer is C .