1,一架飛機在23:50在香港起飛,也在香港時間第二天的12:20抵達倫敦,共飛行了約9750公里.求這飛機飛行的平圴速率.
2,李生駕駛吉普車在廣州出發經天津到北京,廣州到天津的路程約960公里,在這段路共行駛了18小時;天津到北京的路程約1300公里,在這段路程共行駛了24小時.(把下面咁多條題目既答案為2位小數)
A:吉普車在廣州行駛到天津,平均車速是多少?
B:吉普車在天津行駛到北京,平均車速是多少?
C:全程的平均車速是多少??
4條數學題!!急(聽日交!!)10點
2008-04-08 5:47 am
回答 (3)
2008-04-08 7:29 am
1.平圴速率
=9750/12.5
=780km/h
2a 平均車速
=960/18
=53.333...
(=)53.33km/h
2b 平均車速
=1300/24
=54.166..
(=)54.17km/h
2c 全程的平均車速
=(54.17 53.33)/2
=53.75km/h
2008-04-07 23:36:09 補充：
correction!!!!
2c 全程的平均車速
=(960+1300)/(24+18)
=53.809..
(=)53.81km/h
(=)=約等於
=9750/12.5
=780km/h
2a 平均車速
=960/18
=53.333...
(=)53.33km/h
2b 平均車速
=1300/24
=54.166..
(=)54.17km/h
2c 全程的平均車速
=(54.17 53.33)/2
=53.75km/h
2008-04-07 23:36:09 補充：
correction!!!!
2c 全程的平均車速
=(960+1300)/(24+18)
=53.809..
(=)53.81km/h
(=)=約等於
2008-04-08 5:53 am
1, 9750/ 12.5 = 780KM / HR
2a, 860/18 = 47.78KM/HR
b, 1300 / 24 = 54.17KM/HR
c, (47.78 + 54.17) / 2 = 50.98KM/HR
2a, 860/18 = 47.78KM/HR
b, 1300 / 24 = 54.17KM/HR
c, (47.78 + 54.17) / 2 = 50.98KM/HR
2008-04-08 5:52 am
1. 共13.5 小時
9750/13.5
=722.22 km/h
2a. 960/18
=53.33 km/h
2b. 1300/24
=54.17 km/h
2c. (53.33+54.17)/2
=53.75 km/h
9750/13.5
=722.22 km/h
2a. 960/18
=53.33 km/h
2b. 1300/24
=54.17 km/h
2c. (53.33+54.17)/2
=53.75 km/h
收錄日期: 2021-04-24 10:51:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080407000051KK02876