The perimeter of the rectangle is 140m, its length is 10m longer than the width. Find the sides of the rectangle.

Determine the length of the rectangle. Let the length of the rectangle be a, then the width of the rectangle will be a – 10. Make the equation:

(a + a – 10) x 2 = 140;

(2a -10) x 2 = 140;

4a – 20 = 140;

4a = 140 + 20;

4a = 160;

a = 160: 4;

a = 40 m.

Determine the width of the rectangle:

40 – 10 = 30 m.

Answer: the length of the rectangle is 40 meters, the width of the rectangle is 30 meters.