Question

Roberto runs 25 miles. His average speed is 7. 4 miles per hour. He takes a break after 13. 9 miles. How many more hours does he run? Show you work​

Answer 1

Robert must run for 1.5 more hours or 1 hour and 30 minutes.

Explanation:

25 miles - 13.9 miles = 11.1 miles (11.1 miles more left that Robert must run)

He has to run 11.1 more miles and he averages 7.4 miles per hour:

11.1 miles / 7.4 miles per hour = 1.5 hours = 1 hour and 35 minutes

(*Notice that the miles cancel out)

So, Robert must run for 1.5 more hours or 1 hour and 30 minutes.