Question

A box is shaped like a rectangular prism. The length is 1one fourth
​ft, the width is 8​ in., and the height is 10 in. Find the surface area of the box in square inches.
Question content area bottom
Part 1
The surface area is
   in squared.

Answer 1

First convert the length to inches: 1 1/4 ft = 1.25·12 = 15 in.

Surface area = 2(lw + lh + wh) = 2(15·8 + 15·10 + 8·10)
= 2(120 + 150 + 80) = 2(350) = 700.

The surface area is 700 in².