Odpowiedź :
[tex]s = 6 \ km = 6 \ 000 \ m\\t = 4 \ min = 4\cdot 60 \ s = 240 \s\\\\v = \frac{s}{t}\\\\v = \frac{6000 \ m}{240 s} = 25\frac{m}{s}[/tex]
[tex]s = 6 \ km = 6 \ 000 \ m\\t = 4 \ min = 4\cdot 60 \ s = 240 \s\\\\v = \frac{s}{t}\\\\v = \frac{6000 \ m}{240 s} = 25\frac{m}{s}[/tex]