[tex]\vec{v_1}=36 \ km/h=10 \ m/s \\ t_1=50 \ s \\ n_1=200 \ ori \\ d_2=300 \ m \\ \vec{v}=\frac{d}{t} \ \Rightarrow d_1=\vec{v_1}\cdot t_1 \\ d_1=10 \ m/s \cdot 50 \ s=500 \ m \\ \Rightarrow n_2=\frac{200 \cdot 300}{500 \ m} \\ \Rightarrow \boxed{n_2=120\ ori}[/tex]
