Frustrating frustum!

saurjusa

New member
Joined
Oct 11, 2014
Messages
2
Hi all, and thanks for any help you can provide. First, let me state that this is not a homework problem, it is a real life problem that I haven't been able to solve, even though I'm (supposedly) an engineer. For those of you that still wonder when I am ever going to use this in life...it happens. ;)

So, the problem:
Given the Volume of cone's frustum, its height and its smaller base radius, how can I deduce the large base radius?

V=(1/3)·pi·h·(R^2+r·R+r^2)

From this formula of the volume of a frustum i need R.
Thanks,
saur
 
Hi all, and thanks for any help you can provide. First, let me state that this is not a homework problem, it is a real life problem that I haven't been able to solve, even though I'm (supposedly) an engineer. For those of you that still wonder when I am ever going to use this in life...it happens. ;)

So, the problem:
Given the Volume of cone's frustum, its height and its smaller base radius, how can I deduce the large base radius?

V=(1/3)·pi·h·(R^2+r·R+r^2)

From this formula of the volume of a frustum i need R.
Thanks,
saur

You have a quadratic equation in R .... solve it using quadratic formula
 
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