Physics
posted by Dakota .
It takes a runner 3 h, 28 min, 33 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner?

28 min=28/60 of a hour
33 sec=33/3600 of an hour.
add these to 3hr.
avg speed=42200m/timeabove 
Runner A is initially 2.4 km west of a flagpole and is running with a constant velocity of 7.2 km/h due east. Runner B is initially 8.6 km east of the flagpole and is running with a constant velocity of 7.6 km/h due west. What will be the distance of the two runners from the flagpole when their paths cross?

It takes a runner 3 h, 33 min, 27 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner