1. The problem statement, all variables and given/known data http://www.kent.k12.wa.us/pcpow/questions/calc/0401trickortreat/index.html [Broken] This is an old problem, and I have been able to solve one and two, I believe the answers are 1. pi cm/second 2. 50(pi) cm^3/second 3. This is the one I am not sure of. How can I solve this? Isn't there two many variables? 2. Relevant equations V=4/3(pi)r^3 dV/dt= 2(pi)r^2 dC/dt= (2(pi))*cube root(V/(4/3(pi)))*(1/(4/3(pi)))*(dV/dt) 3. The attempt at a solution I am getting lost at three, the rest are pretty easy, I think. THANK YOU!!