Question

list all the possible whole number length and width of rectangles that darla can cut from the 400 square inch piece of paper

Answer 1

The possible dimension are :

400 = 1 x 400
400 = 2 x 200
400 = 4 x 100
400 = 5 x 80
400 = 8 x 50
400 = 10 x 40
400 = 16 x 25
400 = 20 x 20