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 pi.

Radius = 8
Base = 9

1 answer

To wrap the cylindrical box, you need to calculate the surface area of the cylinder plus the areas of the top and bottom circles.

The formula for the surface area of a cylinder is:
Surface Area = 2 * pi * r * h + 2 * pi * r^2
where r is the radius of the cylinder and h is the height of the cylinder.

Given:
Radius (r) = 8
Base (h) = 9

Surface Area = 2 * 3.14 * 8 * 9 + 2 * 3.14 * 8^2
Surface Area = 452.16 + 401.92
Surface Area = 854.08 square units

So, you will need approximately 854.08 square units of wrapping paper to cover the top, bottom, and all the way around the cylindrical box.