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A model plane was 50m above a building initially and then descended 140m.
a) How far was it above the top of the building?
b) If the model plane ascended 80m afterwards,
i) how far was it above the top of the building?
ii) was it above or below the top of the building?
F.1數學(唔該教下我)
2008-12-27 11:29 pm
回答 (2)
2008-12-28 1:36 am
✔ 最佳答案
係咪直落先....如果係直落.....
(a) 140-50 = 90m
(b) (i) 0+80 = 80m
(ii) 80-90 = -10m,therefore below 10m from the top of the bldg
2008-12-27 11:36 pm
50m above and drop 140m, difference is? above or below the building?
80m up again, what is the difference now? above or below the building?
80m up again, what is the difference now? above or below the building?
收錄日期: 2021-04-23 23:14:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081227000051KK01037