Advanced MathEasy–MediumIncrease in a square's side from its areas
Advanced Math practice question
The area of a square garden is 25 square metres. Each side is lengthened by the same amount, and the new area is 49 square metres. By how many metres was each side lengthened?
Answer: 2
The side grew from √25 = 5 to √49 = 7, an increase of 2.
Common wrong answers
- If you answered 7
- 7 is the new side length.
- If you answered 12
- 12 halves 24.
- If you answered 24
- 24 is the increase in area, not in side length.
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