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Two boxes are similar in shape, one being a scale model of the other, and the ratio of their volumes is 8 : 125. Wrapping the smaller box completely takes of paper. How many of paper are needed to wrap the larger box completely?

Competition practiceAreas & Volumes
  • A600
  • B240
  • C384
  • D1500

Step-by-Step Solution

Volumes are in the ratio of the cubes of corresponding lengths, so the linear ratio = ∛8 : ∛125 = 2 : 5. Surface areas are in the ratio of the squares, 4 : 25. Paper needed = .
Answer: A) 600

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