Odpowiedź :
[tex]s = 100 \ m\\t = 20 \ s\\\\v = \frac{s}{t}\\\\v = \frac{100 \ m}{20 \ s}=5\frac{m}{s}[/tex]
[tex]5\frac{m}{s} = 5\cdot\frac{\frac{1}{1000}km}{\frac{1}{3600}h} = 5\cdot3,6 \ \frac{km}{h} = 18\frac{km}{h}[/tex]
[tex]s = 100 \ m\\t = 20 \ s\\\\v = \frac{s}{t}\\\\v = \frac{100 \ m}{20 \ s}=5\frac{m}{s}[/tex]
[tex]5\frac{m}{s} = 5\cdot\frac{\frac{1}{1000}km}{\frac{1}{3600}h} = 5\cdot3,6 \ \frac{km}{h} = 18\frac{km}{h}[/tex]