Question

Use a formula to find the amount of wrapping paper you need to wrap a gift in the

cylindrical box shown. You need to cover the top, bottom, and all the way around


the box. Use 3.14 for it.


7 in. height to 9 in. radius

Answer 1

100.48 square inches

Explanation:

Surface area of a cylinder = 2πr(r+h)

r is the radius

h is the height

Given

radius = 9in

height = 7in

π = 3.14

Substitute into the formula

Surface area of the cylinder = 2(3.14)(9+7)

Surface area of a cylinder = 2*3.14*16

Surface area of a cylinder = 100.48 square inches

Hence the amount of wrapping paper you need to wrap a gift in the

cylindrical box is 100.48 square inches