Re: [問題] 幾題數學
※ 引述《scont ( )》之銘言：
: 1.What is the number of 360-degree rotations that a bicycle wheel made while
: rolling 100 meters in a straight line without slipping?
: (1)The diameter of the bicycle wheel,including the tire,was 0.5 meter.
: (2)The wheel made twenty 360-degree rotations per minute.
: ANS:(A)
: 想問第一個選項 是要先把他變成半徑嗎? 然後是用面積算還是?
題目問的只是輪胎在100公尺內轉幾次360度(=轉一圈)
所以只要能求出輪胎的圓周就是充足
(1)已經直接給你了
(2)這資料沒辦法幫上忙
: 2.If a certain animated cartoon consists of a total of 17280 frames on film,
: how many minutes will it take to run the cartoon?
: (1)The cartoon runs without interruption at the rate of 24 frames per second.
: (2)It takes 6 times as long to run the cartoon as it takes to rewind the film,
: and it takes a total of 14 minutes to do both.
: ANS:(D)
: 想問第二個選項是甚麼意思 看不太懂
: 感謝~
11thOG第81題
撥放卡通的時間是捲片的時間的6倍，撥片+捲片總共要14分鐘
故撥片的時間=12分鐘，條件充足
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03/18 11:37, , 1F
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