Question

find the total surface area of this cone. round to the nearest tenth(my last question of my homework and I keep getting it wrong)​

Answer 1

The surface area is approx. 1017.9 in^2.

Explanation:

Total surface area of cone = πrl + πr^2. Since the radius is 12 in. and the slant height is 15 in, substitute 12 for r and 15 for l.

A = π(12)(15) + π(12)^2

= 180π + 144π

= 324π in^2

≈ 1017.9 in^2

Hope this helps!