2023 AMC 10 B

Complete problem set with solutions and individual problem pages

Problem 20 Medium

Four congruent semicircles are drawn on the surface of a sphere with radius 2, as shown, creating a close curve that divides the surface into two congruent regions. The length of the curcve is \pi \sqrt { n }. What is n? (2023 AMC10B Q20)

  • A.

    32

  • B.

    12

  • C.

    48

  • D.

    36

  • E.

    27

Answer:A