The length and width of a rectangular plot are in the ratio 5:4. If the width is 20 meters shorter than the length, what is the perimeter of the plot?

Explanation

Let the common multiplier be x. Given that length - width = 20, so 5x - 4x = 20, which gives x = 20. Therefore, length = 5 × 20 = 100 meters and width = 4 × 20 = 80 meters. The perimeter is 2 × (length + width) = 2 × (100 + 80) = 360 meters.