北區面積幾大?(平方公里)急急急急!!!!!!!!!!!!唔該哂!!!!!!!!!!!

There are discrepancy area data of North District:
From North District Highlights page: (http://www.districtcouncils.gov.hk/north/english/welcome.htm): 14,000 hectare (please see the check unit conversion calculation at the end)

From Wikipedia Chinese version:
(http://zh.wikipedia.org/wiki/%E5%8C%97%E5%8D%80%E5%8D%80%E8%AD%B0%E6%9C%83)
北區面積約14,000公頃 (hectare)
(please also see the check unit conversion calculation at the end)

From North District Welcome page/ Home page:
http://www.districtcouncils.gov.hk/north/english/welcome.htm): 168 square kilometers

From Wikipedia demographics data: (http://en.wikipedia.org/wiki/North_District%2C_Hong_Kong#Demographics). The North District is about 168 km² in area.

Check Unit Converion:
北區面積 about 14,000 Hectare (公頃)
14,000公頃 (Hectare) X 0.01平方公里（平方千米）(square kilometers) / 公頃 (Hectare);
Hectare unit will cancell out. Therefore, we got: 140 square kilometers (平方公里), which different from demograpic data (168 km² ).

Use the best engineering judgement, the district highlights matches the data from Wikapedia demographics data, when doing planning works, we based on demograpic data:

Use 168 square kilometers (平方千米) for the North District area.

Source:
http://www.districtcouncils.gov.hk/north/english/welcome.htm
http://www.districtcouncils.gov.hk/north/english/welcome.htm
http://zh.wikipedia.org/wiki/%E5%8C%97%E5%8D%80%E5%8D%80%E8%AD%B0%E6%9C%83
http://en.wikipedia.org/wiki/North_District%2C_Hong_Kong#Demographics

Unit Conversion source:
http://zh.wikipedia.org/w/index.php?title=%E5%85%AC%E9%A0%83&variant=zh-hk

北區是本港現今最能保存傳統新界鄉村特色的地區之一，轄區涵蓋上水、粉嶺、沙頭角及打鼓嶺，面積約14000公頃，人口約298900
1平方公里=100公頃
新界北區=140平方公里