 
<translate> Da farko gano tsawon lokacin da hanyar farko ta dauka don tafiya: 20 mil / 5 mil / awa = 4 hours. Sannan ka gano tsawon lokacin da James ya shafe yana tafiya a hanya ta biyu: 12 mil / 3 mil / awa = 4 hours. Sa'an nan kuma ƙara hutu na awa 1 James dole ne ya ɗauki hanya ta biyu: 4 hours + 1 hour = 5 hours. Sa'an nan kuma rage lokacin da za a fara tafiya ta farko daga lokacin da za a bi na biyu don samun bambanci: 5 hours - 4 hours = 1 hour. Saboda haka, amsar ita ce 1. <eng> First find how long the first trail takes to hike: 20 miles / 5 miles / hour = 4 hours. Then find how long James spends hiking the second trail: 12 miles / 3 miles / hour = 4 hours. Then add the 1 hour break James has to take on the second trail: 4 hours + 1 hour = 5 hours. Then subtract the time for the first trail from the time for the second trail to find the difference: 5 hours - 4 hours = 1 hour.
Therefore, the answer is 1. 