Posted by Cassy on Tuesday, March 9, 2010 at 12:31am.
dx/dt = 2 inches/min
V = x^3
so,
dV/dt = 2^3 = 8 cubic inches/min
V = x^3
dV/dt = 3x^2 dx/dt
when V= 27, x = 3, dx/dt = 2
dV/dt = 3(3^2)(2) cubic inches/min
= 54 cubic inches/min
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