A gift box is 15 inches long, 10 inches wide, and 3 inches high. How much wrapping paper is needed to wrap the gift box?
A. 225 in.2
B. 450 in.2
C. 525 in.2
D. 650 in.2
There are six sides to a rectangular gift box. Two opposite sides will have the same length and width, and the other two opposite sides will have the same length and height, and the final two opposite sides will have the same width and height.
Therefore, to calculate the total surface area of the gift box, we can use the formula:
Surface area = 2lw + 2lh + 2wh
where l is the length, w is the width, and h is the height.
Plugging in the values, we get:
Surface area = 2(15)(10) + 2(15)(3) + 2(10)(3) = 300 + 90 + 60 = 450
Therefore, 450 square inches of wrapping paper is needed to wrap the gift box.
Answer: B. 450 in.2