change in depth of water

Jul 2010
A bowl is created by taking the graph \(\displaystyle y=\frac{x^4}{100}\) from \(\displaystyle x=0\) to \(\displaystyle x=6\) and revolving it around the y-axis. Milk is being poured into the bowl at a constant rate of 200 cubic feet per minute. A crack in the bowl appears when the milk reaches a depth of 5 feet, causing milk to leak out of the bowl at 30 cubic feet per minute. What is the rate of change in the depth of the milk when the milk reaches a depth of 12 feet?
Jul 2010
In order to be helped better and faster, you should also explain what you have done so far. What are some things you have tried?