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A rectangle measures 60 by 20 . A square has the same perimeter as this rectangle. By how many does the square's area exceed the rectangle's area?

Competition practiceAreas & Volumes
  • A200
  • B400
  • C600
  • D1600

Step-by-Step Solution

Perimeter of the rectangle = m, so the square's side = 160/4 = 40 m. Square area = , rectangle area = . Difference .
Answer: B) 400

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