Tank walls must be at least 1 foot tall so the turtle can't climb out. there must be 400 square inches of floor space for the turtle to walk around on the volume of the tank must be smaller than 5000 cubic inches .need the dimensions

To find the dimensions of the tank, you will use the volume of a rectangular prism formula.

V = BH, where B is the area of the base and H is the height.
      400 in^2 x 12 in
V = 4800 in^3

This volume would be less than 5000 cubic inches, so to find the dimensions, you will need to find 2 factors that equal 400 (20 in x 20 in).

All the dimensions would be length 20 in, width, 20 in, and height  12 in.