Question

Question

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.(1 point)
Responses

1,884 square centimeters
1,884 square centimeters

942 square centimeters
942 square centimeters

109.9 square centimeters
109.9 square centimeters

1,648.5 square centimeters

Answer 1

To find the lateral surface area of the megaphone, we need to calculate the curved surface area of the cone.

The curved surface area of a cone can be calculated using the formula:

CSA = π * r * l

Where CSA is the curved surface area, r is the radius, and l is the slant height.

Substituting the given values into the formula, we get:

CSA = 3.14 * 15 * 20
= 942 square centimeters

Therefore, the lateral surface area of the megaphone is 942 square centimeters.