Here is my word problem:

SWIMMING POOLYou are designing a rectangular swimming pool that is to be set into the ground. The width of the pool is 5 feet more than the depth, and the length is 35 feet more than the depth. The pool holds 2000 cubic feet of water. What are the dimensions of the pool?

*Please help me to set up, I am having trouble even starting this problem. . .(Thinking)