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posted by Vince on Thursday, June 3, 2010 at 2:21pm.
The scale of map is 1:20000. Find the area on the map which represents 124km^2
area on map = actual area / scale^2 = 124 km^2 / 20000^2 = 124 (1000m)^2 / (20,000)^2 = 124 / 400 m^2 =0.31 m^2
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