Math - Please Help

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The surface area of a right circular cylinder is 1200 cm^2 . If the height of the cylinder is twice its diameter, find the dimensionsof the cylinder.

I know th formula for SA is SA = 2pir^2 + 2pirh
I know h = 2d.
I know r = 1/2 d
What is h in relations to r? Is is 4r?

  • Math - Please Help -

    you are correct. h = 4r

    1200 = pi r^2 h = pi * r^2 * 4r = 4pi r^3

    ...

  • Math - Please Help -

    I don't no

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