Question

A chocolate foil wrapper is in the form of a triangular prism. The surface area of the wrapper is

• A. 60 sq in
• B. 42 sq in
• C. 48 sq in

Answer 1

The correct option is A 60 sq in

The given triangular prism contains two triangular faces and 3 rectangular faces.


Area of triangle = $\frac{1}{2}$ $\times$ base $\times$ height

Base of the triangle = 3 in

Height of the triangle = 2 in

Area of triangle = $\frac{1}{2}$ $\times$ 3 $\times$ 2 = 3 sq in



Area of rectangle = length $\times$ width

Length of the rectangle = 6 in

Width of the rectangle = 3 in

= 6 $\times$ 3 = 18 sq in



Total surface area = 3 $\times$ area of rectangular faces + 2 $\times$ area of triangular faces

= 3 $\times$ 18 + 2$\times$ 3 = 54 + 6 = 60

Hence, total surface area of the chocolate foil wrapper = 60 sq in.