[tex]Dane:\\t = 150 \ min =\frac{150}{60} \ h = 2,5 \ h\\s = 75 \ km\\Szukane:\\v = ?[/tex]
[tex]v = \frac{s}{t}\\\\v = \frac{75 \ km}{2,5 \ h} = 30\frac{km}{h}\\\\30\frac{km}{h} = 30\cdot\frac{1000 \ m}{3600 \ s} =8,(3)\frac{m}{s}\approx 8,3\frac{m}{s}\\\\\boxed{v = 30\frac{km}{h}\approx8,3\frac{m}{s}}[/tex]
