[計量] 請教一題CAT TEST 17-10
Three identical tennis balls fit snugly into a cylindrical can:
the radius of the ball equals the radius of the can, and the balls just
touch the bottom and the top of the can.
If the formula for the volume of a sphere is V = 4/3(r的3次方)π,
what fraction of the volume of the can is not taken by the balls?
(A) 7/9 (B) 1/6 (C) 1/3 (D) 2/3 (E) 3/4
ANS: (C)
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