a cone-shaped megaphone has a radius of 15 centimeters and a slant height of 20 centimeters. a megaphone has an open bottom. what is the lateral surface area of the megaphone, in square centimeters? Use 3.14 for pi
The lateral surface area of a cone can be calculated by using the formula:
Lateral Surface Area = π * r * l
where:
- π is the value of pi (3.14)
- r is the radius of the cone's base
- l is the slant height of the cone
In this case, the radius (r) is given as 15 centimeters and the slant height (l) is given as 20 centimeters.
Substituting these values into the formula, we get:
Lateral Surface Area = 3.14 * 15 * 20
Lateral Surface Area = 942 cubic centimeters
Therefore, the lateral surface area of the megaphone is 942 square centimeters.