Question

In a recent Tour de France time trial, a participant traveled 30.5 mi in a time trial in 1 h, 10 min. a. What was his average speed in mph? b. What is the speed in km/h?

Answer 1

Speed = distance / time

Distance = 30.5 miles

Time = 1h , 10 min

First, convert the minutes in hours:

10/60 = 0.167 hours

1h+ 0.167 = 1.167 hours

Now, apply the formula

Speed = 30.5 m/ 1.167 h = 26.14 miles per hour

To express it in km/ h, express the distance in km

Since;

1 mile = 1.60934 km

30.5 x 1.60934= 49.08 km

Speed = 49.08 km / 1.167 h = 42.07 km/h