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Ancho = a
Perímetro = 108
1)P = 2l + 2a
2) 2l + 2a = 108mt
2(5a) + 2a = 108
12 a = 108
A = 108/12
A = 9mt
Reemplazamos a para encontrar el largo en la 2) ecuacion
2l + 2a = 108
2l + 2(9) = 108
2l + 18 = 108
L = 90/2
L = 45mt
Area
L x a =
45 mt x 9 mt = 405 mt^2