SOLUTION: A right circular cone has an altitude of 20 cm and a base of radius 4 cm. Find the lateral surface area and the total surface area.
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-> SOLUTION: A right circular cone has an altitude of 20 cm and a base of radius 4 cm. Find the lateral surface area and the total surface area.
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Question 253474: A right circular cone has an altitude of 20 cm and a base of radius 4 cm. Find the lateral surface area and the total surface area. Answer by Greenfinch(383) (Show Source):
You can put this solution on YOUR website! Lateral SA is pi x slant height x radius
slant height is done with Pythagoras so sqrt (20^2 + 4^2) = sqrt (416) = 14.7
So Lat SA = 184.7 sq cm
Base area is pi x radius^2 = 50.3 sq cm
Add the two for the total
234.96 sq cm.
