Question 14136
{{{V = (4/3)*pi*r^3}}}

{{{dV/dr = 4*pi*r^2}}}


Now, {{{(dV/dt) = (dV/dr)*(dr/dt)}}} --> confirm, by cancelling the dr terms on the right.


so, we have dV/dr, when r=6 --> find dV/dr.

We also know dr/dt --> 2


So we can find dV/dt.


I do not know what the 24 is though... you say it is dr/dt...the rate of change of r, but that is 2, in the question.


Please check your question.


jon.