Answer:[tex]s_{avg}=\frac{117}{\frac{213}{60}}=32.95 km/h[/tex]
[tex]v_{avg}=\frac{39}{\frac{213}{60}}=10.98 km/h[/tex]
Explanation:
Given
Distance between home and school is 39 km
Total time taken [tex]=\frac{39}{39}+\frac{23}{60}+\frac{39}{39}+\frac{10}{60}+\frac{39}{39}[/tex]
i.e.
[tex]t=3\times 60+23+10=213 min[/tex]
Total Distance traveled =39+39+39=117 km
displacement=39 km
Thus Average speed [tex]=\frac{Distance}{Time\ taken}[/tex]
[tex]s_{avg}=\frac{117}{\frac{213}{60}}=32.95 km/h[/tex]
Average velocity[tex]=\frac{Displacemet}{Time\ taken}[/tex]
[tex]v_{avg}=\frac{39\times 60}{213}=10.98 km/h[/tex]
