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2014-01-24T19:10:22+02:00
P=2*(l+L)
L=120/100*l
44=2*(l+120/100*l)
44=2*220l/100
44=220l/50
220l=2200
l=10cm
L=12cm
A=L*l
A=10*12
a=120 cm patrati
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