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What is the surface area of a cylinder with a top area of 36pi and a height of 20cm

  • math - ,

    Help!!!!!!!!!!

  • math - ,

    You will need the radius
    πr^2 = 36π
    r^2 = 36
    r = 6

    So the surface area around the cylinder, a rectangle
    = 2πrh
    = 2π(6)(2) = 24π

    total surface area = 2 circles + 1 rectangle
    = 2(36π) + 24π = 96π

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