Answer:
9.83 km/h
Explanation:
Given: in a 4 kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third kilometer in 6.3 minutes, and the final kilometer in 6 minutes.
To Find: the average speed of the runner for the race.
Solution:
In a 4 kilometer race,
time required to travel first kilometer =
time required to travel seoond kilometer =
time required to travel third kilometer =
time required to travel final kilometer =
we know that,
Total distance traveled =
Total time taken =
=
=
putting values,
=
the average speed of the runner for the race is approximately