According to the query mathematical formula, 20,000 hectares equals 20,000 hectares equals 100 times 20,000 equals 200 square kilometers.

Hectare = metric unit of area (international unit), and a piece of land with an area of one hectare is 10000 square meters.

Unit conversion:1m2 =100dm2 =10000cm2 =1000000mm2 = 0.0001hectare = 0.0000 1 square kilometer.