what is the surface area of a cone with a radius of 7 feet and a slant height of 9 feet? using 22/7 for pi

Surface area of the cone = 352 feet²

Step-by-step explanation:

To calculate the surface area of a cone, we will use the formula;

Surface area of a cone = πr² + πrl

where r denotes the radius of the cone and l denotes the slant height of the cone.

From the question given

radius r = 7 slant height l=9 and π = 22/7

we can now proceed to insert the variables into the formula and then solve

Surface area of a cone = πr² + πrl

=22/7 * 7² + 22/7 * 7*9

= 22/7 * 49 + 22/7 * 63

=154 + 198

=352 feet²

Surface area of the cone = 352 feet²