The longest one-day bike race goes from Bordeaux, France, to Paris, France. The record for this race was set in 1981 by Herman van Springel of Belgium. He finished the 363.1-mile race in 13 hours, 35 minutes, 18 seconds. What was Springel's average speed for the race?

I would toss the seconds, convert the 35 minutes into hours (35/60)... add the 13 hours. Divide the distance by the resulting hours and you get..