a cylinder has a surface area of 402 cm^2. The height is three times greater than the radius. What is the height of the cylinder?
what i did: 402 = 2πr^2+2πr(3r) how do i separate r?
what i did: 402 = 2πr^2+2πr(3r) how do i separate r?
i dont get how to find the answer
Help! I don't know how to start!
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I'm not sure how to solve this.