ANSWER:
a. 50.53 km/h
b. 32.53 km/h (in the direction of 25˚ S of E)
c. 4.27 km/h
d. 0 km/h
STEP-BY-STEP EXPLANATION:
a.
We have that the speed is given by the following formula:
[tex]\begin{gathered} s=\frac{d}{t} \\ \text{ where s is the speed, d is the distance and t is the time} \end{gathered}[/tex]We know that the equivalence between minutes and hours is that 60 minutes equals 1 hour, therefore:
[tex]s=\frac{16\text{ km}}{19\text{ }\min\frac{1\text{ h}}{60\text{ min}}}=50.53\text{ km/h}[/tex]b.
The velocity is given by the following formula
[tex]\begin{gathered} v=\frac{\Delta x}{t} \\ \text{replacing:} \\ v=\frac{10.3\text{ km-}0\text{ km}}{19\text{ }\min \frac{1\text{ h}}{60\text{ min}}}=32.53 \end{gathered}[/tex]c.
The total distance traveled would then be two 16 kilometers, that is 32 km and the time would be 7.5 hours. we replace
[tex]s=\frac{32\text{ km}}{7.5\text{ h}}=4.27\text{ km/h}[/tex]d.
Since it starts in the same place that it ends, the displacement is equal to 0, therefore, the velocity is equal to 0 km/h
