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    'The diagram shows a sold metal cylinder
    The cylinder has a base radius 2x and height 9x
    The cylinder is melted down and made into a sphere of radius r
    Find an expression for r in terms of x'

    thank you!
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    (Original post by chloe6126)
    'The diagram shows a sold metal cylinder
    The cylinder has a base radius 2x and height 9x
    The cylinder is melted down and made into a sphere of radius r
    Find an expression for r in terms of x'

    thank you!
    I believe they call this type of question mensuration.

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    If you want to actually answer it, I would find expressions for the volume of the sphere and cylinder and equate them.

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    well the volumes have to be the same, so just work from there
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    (Original post by chloe6126)
    'The diagram shows a sold metal cylinder
    The cylinder has a base radius 2x and height 9x
    The cylinder is melted down and made into a sphere of radius r
    Find an expression for r in terms of x'

    thank you!
    it is "setting up and rearranging formulas" in the context of geometric shapes
 
 
 
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Updated: October 28, 2015
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