Pamela can run 100 meters in 12.5 seconds and Josalin can run 150 meters in 20 seconds. If they both ran a 400 meter race at this rate, how many meters ahead would Pamela cross the finish line before Josalin?

Answer 1

time = distance/speed, so
(400/(150/20)-400/(100/12.5))(100/12.5) = 26.66m