9ha = 90,000m²
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9 hectares is equal to 90,000 square meters.
There are 9 hectares in 90,000 square meters. One hectare is equal to 10,000 square meters.
To convert feet to acres, you need to multiply the length and width in feet and then divide by 43,560 (the number of square feet in an acre). 150 feet * 2640 feet = 396,000 square feet 396,000 square feet / 43,560 = 9 acres
The area of Ba Dinh District in Hanoi, Vietnam is approximately 9 square kilometers.
The two countries with the least amount of people per square kilometer are Mongolia and Namibia. Mongolia has a population density of about 2 people per square kilometer, while Namibia has a population density of about 3 people per square kilometer. Both countries have vast, sparsely populated landscapes.