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1984 AMC 12 Question 25

AMC12 · 1984 AMC 12

Question 25

The total area of all the faces of a rectangular solid is $22\text{ cm}^2,$ and the total length of all its edges is $24\text{ cm}.$ Then the length in cm of any one of its internal diagonals is
  1. $\sqrt{11}$
  2. $\sqrt{12}$
  3. $\sqrt{13}$
  4. $\sqrt{14}$
  5. not uniquely determined