[tex]Se~da:\\ \\
v_{a}=8\frac{km}{h}\\ \\
v_{b}=6\frac{km}{h}\\ \\
d=10km\\ \\
t=?s\\ \\
\triangle d_{b}=?m\\ \\ \\
[/tex]
[tex]Formule:\\ \\
t=\frac{d}{v}\\ \\
v=v_{a}+v_{b}\Rightarrow t=\frac{d}{v_{a}+v_{b}}\\ \\ \\
\triangle d_{b}=d-d_{b}\\ \\
d_{b}=t \times v_{b} \Rightarrow d_{b}=d- t\times v_{b}\\ \\ \\[/tex]
[tex]Calcule:\\ \\
t=\frac{10}{8+6}=0,714h=2571,4s\\ \\ \\
d_{b}=10-0,714 \times 6=5,714km=5714m\\ \\[/tex]
