ratio of the length and breadth of a rectangular field is 5:4 and breadth is 30cm less than the length . Find the perimeter
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perimeter = 540cm
l to b ratio 5 :4
l-b = 30
1/9 = 30
therefore
l = 30*5/9 = 150
b = 120
p = 270*2 = 540
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