Hi, I've tried this too many ways and i can't seem to figure it out. the question is: As sand leaks out of a hole in a container, it forms a conical pile whose altitude is always the same as its radius. If the height of the pile is increasing at a rate of 6in/min, find the rate at which the sand is leaking out when the altitude is ten inches. It would be great help, if someone could help me. Thank you.