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. (1 point)
O1,177.5 square inches
O2,198 square inches
O471 square inches
785 square inches
The surface area of a cone can be found using the formula:
Surface area = πr(r + l),
where r is the radius of the base and l is the slant height.
In this case, the radius is 10 inches and the slant height is 15 inches.
Surface area = 3.14 * 10(10 + 15)
Surface area = 3.14 * 10(25)
Surface area = 3.14 * 250
Surface area ≈ 785
Therefore, the surface area of the cone is approximately 785 square inches.
The correct answer is 785 square inches (D).