A square with an area of 144 cm^2 is rotated to form a cylinder. What is the height of the cylinder ?
1 answer:
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Answer:
64 in²
Step-by-step explanation:
I did not ever do a problem like this, however this is the beauty of math, you can easily reverse engineer it.
Remember,
A =
And if we have 4 circles that means the area of one circle is 1/4th the total
So,
A=
Assuming that 16 is the radius squared times 4 lets ignore that squared for now because when going backwards we would get rid of the squared last as that was the first step.
A= =
=4
Now lets get it back to by square rooting the 4
A==2
The radius of one small circle is 2. Therefore; the diameter would be 4 for each. This in mind we know that two small circles diameters make up the radius of the larger circle we will multiply it by two again.
This gives us a final radius of the bigger circle of 8
Therefore, the area of the bigger circle is 8² which simplifies to 64
And a final answer of
64 in²
Hope this helps :)