Originally Posted by

**Ophelia** Hello, this is my first time posting here. I was just wondering if anyone on this board can help me with the solution to this problem:

A cone of radius 5 cms and height 10 cms is lowered, vertex first, into water in a cylindrical tank of radius 20 cms. The vertex of the cone approaches the bottom of the tank at a speed of 1 cm per second. How fast is the water level rising in the tank when half the height of the cone is submerged?

It would be really helpful if you could guide me through each step, as I honestly don’t even know where to start in the first place.