Answer: the return trip took approximately 4 hours.
Step-by-step explanation:
Erica and her friends rode a train to get to their vacation destination. The time that it took them to get to their vacation destination is 5 hours.
The return trip was only 5/6 of the time of the original trip. Therefore, the time that they spent on the return trip would be
5/6 × 5 = 25/6 = 4.16667
Rounding up to the nearest whole number, it becomes 4 hours
