Question

Vă rog rapid,problema 13. Dau coroană :)

Answer 1

[tex]\mathcal{P}=2(l+L)=180\:m\\ L=1\frac{1}{2}l=\frac{3}{2}l\\ \\ 2(l+\frac{3}{2}l)=180\\ \\ 2\cdot\frac{5}{2}l=180\\ 5l=180\\ l=36\:m\\ L=\frac{3}{2}\cdot36=3\cdot18=54\:m\\ \mathcal{A}=l\cdot L=36\cdot54=1944\:m^2[/tex]