What is the surface area of a cone with a diameter of 28 cm. and height 22 cm in terms of Ï.

196Ï cm2

365Ï cm2

561.1Ï cm2

2202.8Ï cm2

To find the surface area of a cone, use this formula.

pi (r) (r + [square root of h^2 plus r^2]) substitute

h = height = 22 r = radius = 28/2 = 14 [ ] = sq. root

pi (14) (14 + [ 22^2 + 14^2 ]) solve exponents

pi (14) (14 + [484 + 196]) add

pi (14) (14 + [680]) solve square root

pi (14) (14 + 2[170]) add

pi (14) (40.0768) multiply

pi (561.075) is about 561.1 rounded to nearest tenth

So the answer is C. 561.1pi cm^2