Dane
s = 10km
t = 28min 18s = 28×60 +18 = 1698s =
[tex] \frac{1698}{3600} = \frac{849}{1800} h[/tex]
Szukane
V = ?
Wzór
[tex]v = \frac{s}{t} [/tex]
Obliczenia
[tex]v = \frac{10}{ \frac{849}{1800} } = 10 \div \frac{849}{1800} = 10 \times \frac{1800}{849} = \frac{18000}{849} = 21 \frac{171}{849} \approx \boxed{\boxed{21\frac{km}{h} }}[/tex]
