Problem: The area of a rectangle remains unchanged when it is made 221 inches longer and 32 inch narrower, or when it is made 221 inches shorter and 34 inch wider. Its area, in square inches, is:
Answer Choices:
A. 30
B. 80/3
C. 24
D. 45/2
E. 20
Solution:
If l and w represent the dimensions of the rectangle, then (l+25)(w−32)=(l−25)(w+34)=lw ∴l=215 and w=38, and the area is 20.