Kelvin can cycle 12km every hour and run 5km every hour. He starts from his home and cycles eastwards for 1 1/2 hours. Then he runs westwards for 1/2 hours. After taking a rest, he jogs 5km westwards. Suppose that positive numbers represent positions on the east of his home. Use a directed number to represent his final position.
答案係10.5KM. 我要步驟同式 THX!
中一英文數學應用題(1題,急!10點)
2010-09-26 10:07 pm
回答 (1)
收錄日期: 2021-04-20 12:35:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100926000051KK00867