[tex] \it a)\ \ \mathcal{P} =2(27+21)=2\cdot48\\ \\ b)\ \ \dfrac{2\cdot48}{3} \cdot100= 2\cdot16\cdot100\\ \\ \\ c) Dimensiunile\ \ gazonului\ \ sunt:\\ \\ L= 27-2=25\\ \\ \ell= 21-2=19\\ \\ Suprafa\c{\it t}a\ gazonului\ este:\\ \\ S = L\cdot\ell = 25\cdot19 [/tex]
