列式+by step .... thank you''
1.某車程需44mins＇全程長35km''問平均時速''是多少km/h?
↑取答案in3個小數位]])
2.一隻飛機900km/h的平均速率飛行]]8:59出發﹔飛去2475公里外的place，What time can arrive there?
↑我計到11:34，but the answer is 11:44[[Help''
3.A city and B city distance[相距] 120km，由A city出發﹜）以40km/h go to B city ，回程以60km/h go back＇''this trip嘅平均車速is?''
小六 速率「應用題 ''
2009-08-31 9:52 am
回答 (2)
2009-08-31 10:25 am
✔ 最佳答案
1.)先將44/60令單位變hr35/(44/60)=47.727km'h
2.)2475/900=2.75h
姐係...165分鐘
11點44分
3.)120/(40+60)=1.2km/h
2009-08-31 02:26:20 補充：
第3題錯左~sor!
係240/100=2.4km/h先岩
2009-08-31 10:25 pm
1. (35/44*60)km/h
= (0.795455*60)km/h
= 47.727km/h
2. (2475/900)h
= 2.75h
= 165 mins
Therefore, 8:59+ 165 mins= 11:44
3. [(40+60)/2] km/h
= (100/2) km/h
=50km/h
圖片參考：http://l.yimg.com/f/i/tw/ugc/rte/smiley_13.gif
= (0.795455*60)km/h
= 47.727km/h
2. (2475/900)h
= 2.75h
= 165 mins
Therefore, 8:59+ 165 mins= 11:44
3. [(40+60)/2] km/h
= (100/2) km/h
=50km/h
圖片參考：http://l.yimg.com/f/i/tw/ugc/rte/smiley_13.gif
收錄日期: 2021-05-03 21:37:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090831000051KK00195