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    I'm taking AS further maths this year, and I'm a bit confused about the volumes of revolution topic. My textbook always has part a as just integrating the function normally and part b as finding the volume of revolution, but how do the two link? Is there any way to find the volume of revolution FROM the integrated function?
    Thanks
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    (Original post by purpleunicorns)
    I'm taking AS further maths this year, and I'm a bit confused about the volumes of revolution topic. My textbook always has part a as just integrating the function normally and part b as finding the volume of revolution, but how do the two link? Is there any way to find the volume of revolution FROM the integrated function?
    Thanks
    In general, no you cannot. This is because you cannot express \displaystyle \int_a^b \pi y^2 .dx in terms of \displaystyle \int_{a}^b y.dx.
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    Okay, thanks!
 
 
 
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Updated: February 16, 2018
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