Math C Question on 'Volumes of Revolution'
Ok so I have the two coordinates (0,3) and (2,7)
The line that runs through them is y=2x+3
How do I find the volume created by rotating the line around the x axis..
In other words, I will be using volumes of revolution.
However, I have only bee taught on this how to just find the volume of a straight line only using one coordinate. Would it work the same or would I need to use both coordinates? Would the limits be from 0 to 7? and then intergrating 4x^2+12x+9 and multiplying it by pie?
Many thanks to those who reply
Re: Math C Question on 'Volumes of Revolution'
If you want to use calculus then
Originally Posted by BryannaAllan
However, simple algebra will work. It is the difference of the volumes of two cones.