Question

What is the surface area of the cylinder?

Answer 1

The surface of a cylinder is made up of three parts.
One part is the lateral surface which is a rectangle with length 2(pi)rh.
The other two parts are identical. They are the circular bases. The area of each one is (pi)r^2.

Answer 2

\(\int_0^{15}12\pi\)dx

Answer 3

So for this one.. It'd be 252pi^2?

Answer 4

Radius = 6, so 2(6*6 * pi) = 72pi is the total area of the two circular bases, Pi*Diameter* height=12x 15 x pi = 180pi is the area of the lateral surface, the sum of these two= 180pi+72pi=252pi

Answer 5

\(d = 12 ~ft\), so \(r = 6 ~ft\)
\(h = 15 ~ft\)
\(SA = 2 \pi rh + 2\pi r^2\)
\(= 2 \pi (6 ~ft)(15 ~ft) + 2 \pi (6 ~ft)^2\)
\(= 180 \pi + 72 \pi \)
\(= 252 \pi ~ft^2\)

Answer 6

@ElaineDunlap
You are correct.