數學 速率問題
回答 (2)
2008-04-14 6:54 am
✔ 最佳答案
她跑步的平均速率= 324米 × 5 / 10 分鐘
= 1620米 / 10分鐘
= 1620米 / (10 × 60) 秒
= 1620米 / 600秒
= 2.7 米每秒
2008-04-13 22:56:59 補充：
The concept of 002 is wrong because he/she should not do cancelling in a fraction with different units in the denomenator and numerator.
參考: P.6 Maths Textbk
2008-04-14 3:23 am
(324x5)m/10min
=1620m/10min
=162m/1min
=162m/60s
=2.7m/s
=1620m/10min
=162m/1min
=162m/60s
=2.7m/s
收錄日期: 2021-04-24 10:47:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080413000051KK02541