Hey there! I'm happy to help!
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ANSWER #1
To find the volume of a cone, you multiply the base by the height and then divide it by three. So, to find the height, we will do it backwards. First, we will multiply by three.
120π×3=360π
Now, we need to divide by the area of the base. To find the area of the base (a circle) you square the radius and multiply it by pi. The radius is half of the diameter, so since the diameter is 12, the radius is 6.
We square six.
6²=36
We multiply by π.
36π
Now, we can divide our 360π by the area of the base.
360π÷36π=10
Therefore, the height is 10 centimeters.
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ANSWER #2
Let's find the volume of this doubled container. Our height will be twenty this time and the diameter will be 24, so the radius will be 12.
First let's find the area.
12²π
144π
Now we multiply by the height.
144π×20=2880π
And then we divide by three.
2880π÷3=960π
Now we divide this by the volume of our original container to see how many times bigger it is.
960π÷120π=8
Therefore, the container's capacity would be 8 times its original capacity.
Have a wonderful day! :D