Hi, I am terrible when it comes to doing these questions. I was wondering if you guys have any tips on how to do these questions. Like for example, just say there's a question like the following: Water is poured into a reservoir in teh shape of a cone 6ft. tall with a radius of 4ft. If water level is rising at 0.5ft/s. How fast is the water being poured at the instant the depth is 2ft? When I see that kind of question, I am clueless on how to even start it out. Is there a trick to doing them? I just don't understand the concept literally. Any hlep would be great thanks.