Re: [計量] 請教一題CAT TEST 17-10

看板GRE (GRE入學考試)作者 (事事如意)時間16年前 (2009/08/26 00:25), 編輯推噓1(100)
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※ 引述《jkkk ( 期待大於等待)》之銘言: : 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) 半徑=r sphere V = 4/3(r的3次方)π *有3顆= 4πr^3 can (cylinder) V=πr^2*h h=高 6*r V= 6πr^3 題目問: 6πr^3 - 4πr^3 ------------------= 1/3 6πr^3 -- ζ ● ■ν) 到了最後 在身邊的 只剩咖啡跟影子... √■_ˍ▁▂▃▄▄▃ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 125.225.129.200

08/26 00:31, , 1F
感謝回覆!! 有種恍然大悟的痛快
08/26 00:31, 1F
文章代碼(AID): #1Ab11neK (GRE)
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文章代碼(AID): #1Ab11neK (GRE)