Réponses

2013-04-01T14:20:14+02:00
2013-04-01T14:29:18+02:00

l+5 = L

 

85 m = l + L ==> 85 m = l +( l+ 5) = l + l +5 = 2l + 5 = => 85-5 = 2l ==> 80 = 2l ==> 40 = l

 

Largeur 40 m

longueur = 40 + 5 = 45 m