## GMAT Practice Question Set #37 (Question 109-111)

Problem Solving Question #111: Circular Ring With Thickness
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 The figure here is a ring with a thickness shown in black. If the radius to the outside edge of the ring  is r and the thickness of the ring is t, then which of the following expressions best describes the area of the ring's thickness? (A) pi(r-t)^2 (B) pi(r^2 - t^2) (C) 2pi(r-2t) (D) pir(2r-t) (E) pit(2r-t)
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