Cylindrical Tank and Rectangular Pond Volume Transfer

A cylindrical water tank stands vertically with a radius of 3 meters and a height of 10 meters. The tank is full of water and a drain at the bottom...

After 4 hours of draining, the volume of water decreases to three-quarters of the initial volume. The water is then redirected to a rectangular pond that is 2 meters deep, with a length of 5 meters and a width of 4 meters.

What is the height of the water in the pond after draining the tank?