圓周牽題目

2009-02-24 4:22 am
一個直徑是56cm的圓桶,滾動了44m使停下。它滾動了多少周才停下來?

回答 (3)

2009-02-24 11:21 am
✔ 最佳答案
我覺得用22/7做圓周率較好,因為可以直接約簡

44X 100 ÷ (56 × 22/7)
=4400 ÷176
=25
2009-02-24 5:34 am
440÷(56×3.14)
=440÷175.84
=2.50227...
=2.6(取自小數點後一位)

2009-02-23 21:37:28 補充:
寫錯,應該是:
4400÷(56×3.14)
=4400÷175.84
=25.0227...
=25
2009-02-24 4:32 am

一條式:
p.s (44 x 100 is for change to cm)
(44 x 100) / (56 x 3.14)
=4400/175.84
=25.022..
= 25
圖片參考:http://tw.yimg.com/i/tw/ugc/rte/smiley_4.gif





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