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 471 square inches
b 785 square inches
c 1,1775.5 square inches
d 2,198 square inches
The formula for the surface area of a cone is given by:
Surface Area = πr(r + l)
Where r is the radius and l is the slant height.
Given that the radius (r) is 10 inches and the slant height (l) is 15 inches, we can substitute these values into the formula:
Surface Area = 3.14(10)(10 + 15)
Surface Area = 3.14(10)(25)
Surface Area = 3.14 * 250
Surface Area = 785 square inches
Therefore, the correct answer is b) 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