[tex]dane:\\s = 10 \ km\\v = 40\frac{km}{h}\\szukane:\\t = ?\\\\Rozwiazanie\\\\s = v\cdot t \ \ /:v\\\\t = \frac{s}{v}\\\\t =\frac{10 \ km}{40\frac{km}{h}}\\\\t = \frac{1}{4} \ h=\frac{1}{4}\cdot 60 \ min = 15 \ min[/tex]
Odp. Szukany czas t = 15 min.
