{}triangle abc with the given measurements is rotated in space about side ab. which answer gives the solid formed and its surface area?

First we've got to do some imagining. If we rotate the triangle about AB, what's the 3D shape?

A cone!
The answered are narrowed to A and C.

A cone has two surfaces, a circle at the bottom, and the curved surface like a party hat.

Since there should be two areas added together, which answer do you think it is; A or C?

(You can comment answer and I'll check with you)

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