Question

Suppose you need to build a box with a surface area of 90 square feet. If the length is 5 feet and the height is

2 feet, what is the width of the box?

Answer 1

Hi there!

Your answer is:

W=17.5feet

Explanation:

We use the surface area form for a cuboid:

2h(l+w)=SA

Fill in the known values!

2(2)* (5+ W) = 90

Solve for W!

4*(5+W)=90

20+4w=90

-20

4w=70

/4

W=17.5feet