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a cube and a cylinder have the same surface aera. If the cube has an edge of 6 cm and the cylinder a radius of 2 cm, calculate
a) the surface area of the cube             (216 cm^2)
b) the height of the cylinder ????????

i know the surface area of the cube but how do I get the height of the cylinder?

Jun 7, 2021

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Jun 7, 2021
#2
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Remember the formula for surface area of cone: it's $$a=\pi r\left(r+\sqrt{h^2+r^2}\right)$$

You have the surface area of the cone, and the radius of the cone. Just substitute both and solve for the height.

Jun 7, 2021
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I've read the question twice, but I couldn't find the word cone.

Cylinder height    h = [216 - 2(r2pi)] / 2r*pi

h = 15.18873386 cm

Guest Jun 7, 2021