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# Surface Area of A Cylinder

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Joyce uses the formula S = 2pir(r+h) to find the surface area of a cylinder. Assuming she uses the correct values for r and h, will she get the correct volume? Why?

Guest Apr 24, 2017
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Joyce uses the formula S = 2pir(r+h) to find the surface area of a cylinder. Assuming she uses the correct values for r and h, will she get the correct volume? Why?

$$\color{red}S=2\pi r(r+h)\\S=2\times \pi r^2+2\pi r \times h$$

Yes it is right.
Twice the base area and
the outer surface as a product of circular circumference and height.

!

asinus  Apr 24, 2017