Question 963413

 A rectangular tank with a square base is 1/4
 full of water. The side length of the square base is 20 inches. When another 3,000 cubic inches of water is poured into the tank, it becomes 2/3 full. 
 a) Find the capacity of the tank. 
 b) When the tank is 2/3 full, what is the height of the water?
<pre>Capacity: {{{highlight_green(7200)}}} cub inches
Height, when {{{2/3}}} full: {{{highlight_green(12)}}} inches