+252 The surface area of a right cone which has a base diameter of 6 units and a height of 8 units is:
A) 75 units squared.
B) 108 units squared.
C) 151 units squared.
D) 188 units squared.
Surface Area = Lateral area + Base area
Radius =Diameter/2
=6/2 =3
Slant Height =sqrt[8^+ 3^2]
=8.544
Lateral area=Slant Height x Pi x Radius
=8.544 x 3.141592 x 3
=80.525 units squared
Base Area =Pi x r^2
=3.141592 x 3^2
=28.274 units squared
Surface Area =80.525 + 28.274
=108.8 =~109 units squared.
Note: Because I used Pi to 6 decimal places instead of 2 decimal places, I got the answer closer to 109.
