Răspuns :
Salut.
P=2(L+l)=80cm=>L+l=40cm
R=L/l=1,5
1,5=15/10=3/2
L/l=3/2=>2L=3l=>L=3l/2
[tex]\frac{3l}{2} +l=40\\3l+2l=80\\5l=80\\l=16cm\\L=(3*16)/2=24cm[/tex]
P = 2(L + l)= 80 cm => L + l = 40 cm
L/l = 1,5 = 15/10 = 3/2 => L = 3l/2
Înlocuim in prima relatie:
3l/2 + l = 40
3l/2 + 2l/2 = 40
5l/2 = 40
5l = 40 × 2 = 80
l = 80 : 5
l = 16 cm
L = 3l/2 = 3×16/2
L = 24 cm