400
Draw and label two rectangles with perimeters of 30 inches but different areas.
All possibilities:
14 in by 1 in, A=14 square inches
13 in by 2 in, A=26 square inches
12 in by 3 in, A=36 square inches
11 in by 4 in, A=44 square inches
10 in by 5 in, A=50 square inches
9 in by 6 in, A=54 square inches
8 in by 7 in, A=56 square inches