Odpowiedź :
[tex]dane:\\72\frac{km}{h} = 72\cdot\frac{1000 \ m}{3600 \ s} = 20\frac{m}{s}\\s = 320 \ m\\szukane:\\t = ?\\\\t = \frac{s}{v}\\\\t = \frac{320 \ m}{20\frac{m}{s}}\\\\t = 16 \ s[/tex]
[tex]dane:\\72\frac{km}{h} = 72\cdot\frac{1000 \ m}{3600 \ s} = 20\frac{m}{s}\\s = 320 \ m\\szukane:\\t = ?\\\\t = \frac{s}{v}\\\\t = \frac{320 \ m}{20\frac{m}{s}}\\\\t = 16 \ s[/tex]