In a certain instance, a plane flying horizontally was at a distance 5000m vertically above Timmy's head. After 10 seconds, it was 6000 m from Timmy's head.What was the speed of the plane in km/h?
----use Pyth.Thm
----Corr. to 2 sig.fig.
Thx a lot!
maths 急!plz!
2006-12-01 4:13 am
回答 (2)
2006-12-01 4:30 am
✔ 最佳答案
let x km be the distance the plane has flown x^2+5^2 = 6^2 (pyth.thm)
x^2 = 11
x = 開方 11
The speed of the plane
= 開方 11/ 10/3600
=1200 km/ h
2006-11-30 20:31:35 補充：
= 1200 km/h 加番個(corr. to 2sig.fig)so the speed of the plane was 1200km/h
參考: Me
2006-12-01 4:25 am
The distance the plane travels
開方(6000^2-5000^2 /1000)
=3.317km
The speed of the plane
3.317/(10/(60x60))
=1200km/h(Corr. to 2 sig.fig.)
開方(6000^2-5000^2 /1000)
=3.317km
The speed of the plane
3.317/(10/(60x60))
=1200km/h(Corr. to 2 sig.fig.)
參考: me
收錄日期: 2021-04-12 23:04:45
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https://hk.answers.yahoo.com/question/index?qid=20061130000051KK03524