Home > AC > Chapter 16 > Lesson 16.9.1.2 > Problem9-28

9-28.

1. Find the surface area.
2. Sum up the cost of each part.

$\text{Surface Area }= x^2 + 2xh + 2xh = x^2 + 4xh$

$\text{Cost of Construction }= (3\text{ dollars})x^2 + (1\text{ dollar}) 4xh = 3x^2 + 4xh$