What is the surface area, in square inches, of a cone with a radius of 10 inches and a slant height of 15 inches? Use 3.14 for pi.
A) 785 square inches
B) 471 inches
C) 1, 777.5 square inches
D) 2, 198 square inches
The formula to find the surface area of a cone is:
Surface Area = π * r * (r + l)
where r is the radius and l is the slant height.
Substituting the given values into the formula:
Surface Area = 3.14 * 10 * (10 + 15)
Surface Area = 3.14 * 10 * 25
Surface Area = 785 square inches
The surface area of the cone is 785 square inches.
The correct answer is A) 785 square inches.
1. 785 square inches
2. 1,354.125 square centimeters
3. 452.16 square centimeters
4. 226.08 square feet
5. 942 square centimeters