The width of a rectangular sports hall is 20 m. Find the perimeter of the hall if its area is equal to 140 m2.

1) Let’s find out how long the hall has, if it is known that it is rectangular in shape and its width is 20 meters, and the area is 140 m².

140/20 = 7 m.

2) We find out what perimeter the hall has, if it is known that its width is 20 m, and the length that we found was 7 m.

(7 + 20) * 2 = 54 m.

Answer: the perimeter of the rectangular hall was 54 m.

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