The average marathon is 42 km long. if the average person can run the marathon with an average velocity of 2.57 m/s, how long will it take to finish the race

16,342seconds

Explanation:

Average velocity is defined as the rate of change in displacement of a body. Mathematically,

Average velocity = Displacement/Time

Given average distance a person can run = 42km = displacement

Average velocity = 2.57m/s

Substituting the values in the formula to get the time;

Time = Displacement/velocity

42km to metres = 42000m

Time = 42000/2.57

Time = 16,342seconds

It will take approximately 16,342seconds to finish the race