Agroup of runners complete a 26.2 mile marathon in 3.4 hours. the distance between the start and finish lines is 12.2 miles. what was the average velocity for the run?

Explanation:

As we know that the total path length of the Marathon is given as

while the straight distance between start and finish lines is given as

so here we can say that the displacement is the straight line distance between initial and final position which is 12.2 miles

so it is given as

now the average velocity is defined as the ratio of displacement and time

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)