Răspuns :

L=3l

P=2(L+l)=2(3l+l)=2·4l=8l

8l=24

l=3m

L=9m

2 × ( L + l ) = 24

L = 3 × l

2 × ( 3 × l + l ) = 24

2 × 4 × l = 24

8 × l = 24

l = 24 : 8

l = 3 m

L = 3 × 3

L = 9 m

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