The ratio of the length and breadth of a rectangular plot is 5 : 4. If the breadth is 20 meters less than the length, what is the perimeter of the plot?

अनुपात में अंतर = 1 इकाई। 1 इकाई = 20 मीटर। लंबाई = 5 * 20 = 100 मीटर, चौड़ाई = 4 * 20 = 80 मीटर। परिमाप = 2(L + B) = 2(100 + 80) = 360 मीटर।