[tex]a) \: p = (10 \frac{3}{4} m {)}^{2} = \frac{1849}{16} = 115 \frac{9}{16 {m}^{2} } \\ [/tex]
[tex]1 {m}^{2} —400zl \\ 115 \frac{9}{16} {m}^{2} —x \\ x = 25875zl[/tex]
[tex]b)obw = 4 \times 10 \frac{3}{4}m = 4 \times \frac{43}{4} m = 43m \\ 43 - 4 = 39m - odliczona \: brama \\ 39m \times 180zl = 7020zl \\ 4m \: bramy \: to \: 1200zl \\ 7020 + 1200 = 8220zl[/tex]
