Question

Uses 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 pi.

Answer 1

960.84 in^2

Explanation:

The formula for the surface area of a cylinder is ...

SA = 2πr^2 +2πrh = 2πr(r +h)

For the given box, the surface area is ...

SA = 2π(9 in)(9 in + 8 in) = 306π in^2

SA = 960.84 in^2

960.84 square inches of wrapping paper are needed.