# Thread: Volume of Solid of Revolution by Integration

1. ## Volume of Solid of Revolution by Integration

i need help with the very last question with the graph, part c where it says find volume, i am very new to calculus and never came across this did my research and found volume of solid by revolution , found something called washer as well. so confused sigh

2. ## Re: Volume of Solid of Revolution by Integration

To find the volume of a region bounded above by y = f(x) and below by the x axis, rotated about the x axis, use \displaystyle \begin{align*} V= \pi \int_a^b{ \left[ f(x) \right] ^2 \, \mathrm{d}x } \end{align*}

3. ## Re: Volume of Solid of Revolution by Integration

that makes no sense to me. but okay thanks anyway

4. ## Re: Volume of Solid of Revolution by Integration

Originally Posted by JadaPsherman
that makes no sense to me. but okay thanks anyway
If you are not familiar with the general integral form for finding a volume of rotation using the method of disks, why were you assigned such a problem?

5. ## Re: Volume of Solid of Revolution by Integration

i cant answer that question skeeter. the lecturer is trying to cover a calculus course that usually runs for 2 years (4 semesters). in one semester. its an assignment for math. but from the looks of it il have to repeat this course anyway. cant drop the course because it mandatory for my degree