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# Maths Help! watch

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1. Can someone help me with this cone question.

I worked out the height which is 6cm.
then...

x n x 8² x 6
x n x 64 x 6... I don't know how to give my answer in pie (n)
I just did 64 ÷ 3 = 21.3333333333 whats next?
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2. You forgot to do pi*r^2 for the area of the circular base, so it is (64pi * 6)/3
3. (Original post by web-girl)
Can someone help me with this cone question.

I worked out the height which is 6cm.
then...

x n x 8² x 6
x n x 64 x 6... I don't know how to give my answer in pie (n)
I just did 64 ÷ 3 = 21.3333333333 whats next?
21.3333333333 * 6 = 128n

You times it by 6 because its the height and your working out the volume.
4. (Original post by maths_crisis)
21.3333333333 * 6 = 128n

You times it by 6 because its the height and your working out the volume.
Thanks!
5. (Original post by web-girl)
Can someone help me with this cone question.

I worked out the height which is 6cm.
then...

x n x 8² x 6
x n x 64 x 6... I don't know how to give my answer in pie (n)
I just did 64 ÷ 3 = 21.3333333333 whats next?
So now, 1/3 * pi * 64 * 6
= 1/3 * pi * 384
= 128 pi

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