How to find the depth of a rectangular prism? I already have the length, width ad the volume. But I'm confused on how to find the height?

You have everything you need to find it.

Look at this for a second:

Volume = (length) x (width) x (height)

Divide each side of this equation by (length) x (width), and you have

Height = (Volume) / (length x width)

You have all the numbers on the right side, so you can easily find the height.

set up your equation

Length x Width x Height = Volume

plug in the known factors and simplify L x W x H. Divided the numerical value on both sides. you are left with H