If a marathon runner averages 9.6 mi/h, how long does it take him or her to run a 26.22 mi marathon?

For this case, the first thing you should know is that by definition:

Where,

t: time to travel the distance

d: distance traveled

v: speed

Therefore, substituting values we have:

it takes him or her 2.7 hours to run at 26.22 mi marathon