Answer:
Explanation:
For 1-(a)velocity [tex]v=120\ km/h[/tex]
[tex]d=180\ km[/tex]
time [tex]t=\frac{d}{v}=\frac{180}{120}=1.5\ hr[/tex]
1-(b)velocity [tex]=12\ mph[/tex]
time [tex]t=3\ hr[/tex]
distance [tex]d=vt=12\times 3=36\ miles[/tex]
2(a)velocity [tex]v=32\ mph[/tex]
time [tex]t=1\ hr[/tex]
distance [tex]d=vt=32\times 1=32\ miles[/tex]
2(b)velocity [tex]v=840\ km/h[/tex]
distance [tex]d=420\ km[/tex]
time [tex]t=\frac{d}{v}=\frac{420}{840}=0.5\ hr[/tex]
3(a)velocity [tex]v=14\ km/h[/tex]
distance [tex]d=35\ km[/tex]
time [tex]t=\frac{35}{14}=2.5\ hr[/tex]
3(b)velocity [tex]v=74\ mph[/tex]
time [tex]t=\frac{5}{2}\ hr[/tex]
distance [tex]d=vt=74\times \frac{5}{2}=185\ miles[/tex]
