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March 29, 2015

March 29, 2015

Posted by **jon** on Monday, October 18, 2010 at 2:47pm.

- calculus -
**Reiny**, Monday, October 18, 2010 at 3:41pmradius of cone --- r

height of cone ---h

vol = (1/3)πr^2 h

but h = 2r or r = h/2

so

Vol = (1/3)π (h^2/4)(h)

= (1/12)π h^3

d(Vol)/dt = (1/4)π h^2 dh/dt

so when h = 14

30 = (1/12)π(196) dh/dt

solve for dh/dt

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