Question

A shipping tube is shaped like a triangular prism. The bases are equilateral triangles with edges of 5 inches and a height of 4.3 inches. The tube is 14 inches long. Find the total surface area of the shipping tube.

A: 253
B:231.5
C:221.75
D:161.5

Answer 1

4.3*5 - area of 1 triangle

4.3*5*2 - area of 2 triangles

= 43

5*14 - area of 1 rectangle

5*14*3 - area of 3 rectangles

= 210

210+43 = 253