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A square with an area of 81 cm^2 is rotated to form a cylinder. What is the height of the cylinder?
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A square with an area of 81 cm^2 is rotated to form a cylinder. What is the height of the cylinder?

User AlexanderBrevig
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1 Answer

2 votes
The area of a square is just:

A=s^2 so

s^2=81

s=9 so if this square is rotated about its center you will get a cylinder with a radius of 4.5 cm and a height of 9 cm.

So the height is 9 cm
User Nepete
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