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)
1,884 square centimeters
109.9 square centimeters
942 square centimeters
1,648.5 square centimeters
The lateral surface area of a cone can be calculated using the formula A = πrℓ, where r is the radius and ℓ is the slant height.
In this case, the radius (r) is given as 15 centimeters and the slant height (â„“) is given as 20 centimeters.
Plugging these values into the formula, we get:
A = 3.14 * 15 * 20
= 942 square centimeters
Therefore, the lateral surface area of the megaphone is 942 square centimeters.