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    If I were to have 2 cones:
    One with a surface area of 60cm^2 and a larger one at 135cm^2.
    If the smaller cone had a height of 15cm how is the height of the larger cone calculated. I understand that you need a ratio but not sure how to arrive at a final answer.

    (I posted another similarity question recently but not sure if having surface area changes things.)
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    the length scale factor is the square root of the area scale factor
 
 
 
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