To calculate the lateral surface area of a cone, you can use the formula:
Lateral surface area = π * r * l
Where r is the radius of the cone and l is the slant height.
Given that the diameter is 18 meters, the radius is half of that, so r = 9 meters.
Plugging in the values, the lateral surface area is:
Lateral surface area = 3.14 * 9 * 15 = 423.9 square meters
So, the choice closest to the lateral surface area is:
C. 424 square meters
The cone shown has a diameter of 18 meters and a slant height of 15 meters. Which choice is closest to the lateral surface area? Use 3.14 to approximate pi.
A. 170 square meters
B. 339 square meters
C. 424 square meters
D. 1,356 square meters
1 answer
1 answer