Answer:
11.1m/s
Step-by-step explanation:
Given parameters:
Distance of store = 5miles
Time to store = [tex]\frac{1}{2}[/tex]hr
Time from store = [tex]\frac{2}{5}[/tex]hr
Unknown:
Average speed = ?
Solution:
Average speed is the total distance divided by the total time taken.
Average speed = [tex]\frac{total distance}{total time taken}[/tex]
Total distance = distance to store + distance from store = 5 + 5 = 10miles
Total time taken = [tex]\frac{1}{2}[/tex]hr + [tex]\frac{2}{5}[/tex]hr = [tex]\frac{9}{10}[/tex]hr
Average speed = [tex]\frac{10}{\frac{9}{10} }[/tex] = 10 x [tex]\frac{10}{9}[/tex] = 11.1m/s
