A car runs 180 km in 2.5 hours.
If its speed is increased by 2 m/s, find the distance in km that it will travel in 90 minutes.
MTH Rate and ratio
2012-01-10 6:41 am
回答 (2)
2012-01-10 7:10 am
✔ 最佳答案
new speed= (180*1000)/(2.5*60*60) + 2 =20+2=22 m/sdistance = 22*(90*60)=118800m=118.8km
2012-01-11 01:31:27 補充：
候選編號 002
unit of distance is not "km/s"
2012-01-11 1:42 am
speed=180000/2.5*3600=20m/s
new speed=20+2=22
distance=22*90*60/1000=118.8km/s
new speed=20+2=22
distance=22*90*60/1000=118.8km/s
收錄日期: 2021-04-20 12:01:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120109000051KK01037