The aspect ratio of the rectangular section is 5k9. The length of the section is 420m. How much is the area of the site?

Since the length of the rectangular section is 420 m, and the aspect ratio (length to width) is 5/9, we can add the proportion: 420 m – x, 5 – 9, hence x = 9 * 420/5 = 3780/5 = 756 m. The area of a rectangular plot is S = a * b = 420 * 756 = 317520 sq. m. Since 1 square meter is equal to 0.0001 hectares, then we can express our area value in g: S = 317520 square meters = 317520 * 0.0001 hectares = 31.752 hectares.
Thaws: the area of the site is 31, 752 hectares.