[tex]dane:\\W = 600 \ kJ = 600 \ 000 \ J\\P = 500 \ kW = 500 \ 000 \ W\\szukane:\\t = ?\\\\P = \frac{W}{t} \ \ \rightarrow \ \ t = \frac{W}{P}\\\\t = \frac{600000 \ J}{500000 \ W} = \frac{600000 \ kg\cdot\frac{m^{2}}{s^{2}}}{500000 \ kg\cdot\frac{m^{2}}{s^{3}}} = \frac{6}{5} \ s = 1,2 \ s[/tex]
