Unknown volumes?

[Cassandra123]

Squares are cut down from the corners of a rectangular sheet of metal 30 inches by 50 inches. The four sides are then turned up and soldered. How large are the squares if the volume of the resulting open metal box is 2392 cubic inches? How about 4000 cubic inches?

ive drawn a diagram but i honestly dont get it so i am sorry i cant show any work.
please help and explain how the steps are done?

 

[Denis]

please help and explain how the steps are done?

Your teacher did not explain anything? :shock: