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1987 AMC 12 Question 22

AMC12 · 1987 AMC 12

Question 22

A ball was floating in a lake when the lake froze. The ball was removed (without breaking the ice), leaving a hole $24$ cm across at the top and $8$ cm deep. What was the radius of the ball (in centimeters)?
  1. $8$
  2. $12$
  3. $13$
  4. $8\sqrt3$
  5. $6\sqrt6$