1.
[tex]s = 480 \ km\\t = 6 \ h\\\\v = \frac{s}{t}\\\\v = \frac{480 \ km}{6 \ h}\\\\v = 80\frac{km}{h}[/tex]
2.
[tex]v = 13\frac{mm}{s}\\t = 5 \ min = 5\cdot60 \ s = 300 \ s\\\\s = v\cdot t\\\\s = 13\frac{mm}{s}\cdot300 \ s\\\\s = 3 \ 900 \ mm = 3,9 \ m[/tex]
3.
[tex]s = 50 \ m\\v = 50\frac{cm}{s} = 0,5\frac{m}{s}\\\\t = \frac{s}{v}\\\\t = \frac{50 \ m}{0,5\frac{m}{s}}\\\\t = 100 \ s = 1 \ min \ i \ 40 \ s[/tex]
