[tex]P_{p} = 15 \ m\times 10 \ m = 150 \ m^{2}\\\\V = \frac{4}{5}\cdot240 = 192 \ m^{3}\\\\V = P_{p}\cdot H \ \ /:P_{p}\\\\H = \frac{V}{P_{p}} = \frac{192 \ m^{3}}{150 \ m^{2}} = 1,28 \ m\\\\Odp. \ A.[/tex]
