To find the volume generated by rotating an area bounded by 2 curves f(x) and g(x) around the x-axis(adsbygoogle = window.adsbygoogle || []).push({});

we use the formula

Int of lower and upper intersections pi( f(x)^2-g(x)^2 ) dx

or

Int of lower and upper intersections pi (f(x)-g(x))^2 dx

I understand that they are different but i am confused when to use the correct formula.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Integration to find volume generated

**Physics Forums | Science Articles, Homework Help, Discussion**