You want to wrap a gift box that is 3 in. long, 5 in. wide and 10 in. high. How much gift wrap will you need to cover the entire box?

Question

A
150
�
�
.
3
in.
​3
​​

B
150
�
�
.
2
in.
​2
​​

C
190
�
�
.
2
in.
​2
​​

D
190
�
�
.
3
in.
​3
​​

Answer 1

The formula to calculate the surface area of a rectangular box is 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height.

In this case:
l = 3 in.
w = 5 in.
h = 10 in.

Plugging in these values into the formula:
2(3)(5) + 2(3)(10) + 2(5)(10) = 30 + 60 + 100 = 190 in^2

Therefore, you will need 190 square inches of gift wrap to cover the entire box.

The correct answer is C) 190 in^2.