Math Is Fun Forum

NiCeBoY

Member

Registered: 2008-08-30

Posts: 6

Finding volume of Revolution help

Hello,
I have worked this question on finding the volune of revolution.. but i think there is something wrong..
I have posted the question + my works up to the answer.

Can anyone check it and let me know if its good please?
I have to submit it in 12 hours time.

The question:

My answer:

Should i use this formula ?if yes how do i apply it here...

Formula:

Thanks in advance..

luca-deltodesco

Member

Registered: 2006-05-05

Posts: 1,470

Re: Finding volume of Revolution help

you have used that formula, in this case R was 5x, and r was x^2

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NiCeBoY

Member

Registered: 2008-08-30

Posts: 6

Re: Finding volume of Revolution help

ah ok thanks man/..