The fish tank has side lengths $16 in$, $12 in$ and height $20 in$ .
The water level is two inches below the top of the tank.
A glass sphere of radius $1 in$ is dropped in to the tank. What is the new distance from the water to the top of the tank? $in$ .
How many of these balls can be put into the tank with the tank not overflowing? spheres .