What is the approximate surface area of the cone shown here?

A. 533.3 mm^2
B. 298.3 mm^2
C. 165.0 mm^2
D. 251.2 mm^2

Please help !( ^ means squared )

Question

What is the approximate surface area of the cone shown here?

A. 533.3 mm^2
B. 298.3 mm^2
C. 165.0 mm^2
D. 251.2 mm^2

Please help !( ^ means squared )

anonymous · Answer

attachment

jamesj · Answer

What's the formula for the surface area of a cone?

anonymous · Answer

Not sure :/

apoorvk · Answer

Okay, so the total surface area of the figure, would be the lateral surface area of the conical part + the area of the circular base. okay with that?

jamesj · Answer

http://www.khanacademy.org/test-prep/california-standards-test/geometry-2/v/ca-geometry--area--pythagorean-theorem

anonymous · Answer

Alright ...

apoorvk · Answer

Wanna try that^ link out? It's actually pretty helpful - check that out.

anonymous · Answer

I will , thanks .

anonymous · Answer

Oh and where is Khan accedemy o.O never heard of it

jamesj · Answer

It's an on-line only resource and good one.  I'd check out this video; it will help you with this problem.

anonymous · Answer

Thanks .

jamesj · Answer

A problem like yours can be found beginning at 4:10 in the video.