If expansion adds 400 inches to the existing 2,540 inches, what is the total storage inches required?

• A. 2,540 inches
• B. 2,940 inches
• C. 3,240 inches
• D. 2,500 inches

Answer: (B)

When something expands, you increase the current amount by the expansion amount. So you add 400 inches to the existing 2,540 inches: 2,540 + 400 = 2,940 inches. That gives the total storage required. The other numbers don’t fit because they would come from not expanding (2,540), adding a different amount (3,240 would come from adding 700), or subtracting (2,500 is 40 inches less).