A right cone has an altitude of 4 units and a base diameter of 6 units. What is its lateral area?
A) 37.7 units squared
B) 47.1 units squared
C) 62.8 units squared
D) 75.4 units squared
Lateral area =
pi * (radius) * √ [ height ^2 + radius^2 ] =
pi * ( 4 ) * √ [ 4^2 + 3^2 ] =
pi * ( 4 ) * √25 =
pi * ( 4 ) * (5 ) =
20 pi units^2 ≈ 62.8 units^2
+252 
