51. 6587-!-item-!-187;#058&005111
Circular gears P and Q start rotating at the same time at constant speeds.
Gear P makes 10 revolutions per minute, and gear Q makes 40 revolutions
per minute. How many seconds after the gears start rotating will gear Q
have made exactly 6 more revolutions than gear P ?
(A) 6
(B) 8
(C) 10
(D) 12
(E) 15
這題解答上少給答案了
大家可以算一下看答案是哪一個嗎？
請告訴我算法 感謝你
我的答案是D
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※ 編輯: Diablotin 來自: 174.1.45.169 (08/19 09:03)