Question

Carl Can ride his bike twice as fast as he can jog. He jogged three times around a 1 mile trail in 24 minutes and then rode the same trail with his bike how long did it take him to bike the trail once

Answer 1

It took him 12 mins to bike the trail because it implies that you bike faster than jogging so the time should be shorter hence bike twice as fast as jogging

Answer 2

It will take him 4 minutes to go around the trail with his bike once.
He did 3 miles jogging in 24 minutes. So it took him 8 min per mile (24 /3 = 8).
Since he bikes twice as fast as he jogs, it will take him half the time (8/2 = 4).