Eric fell asleep at 3:15 pm, and he woke up after 2 hours and 35 minutes. To determine the time he woke up, we need to add the time he was asleep to the time he fell asleep.
2 hours and 35 minutes is equivalent to 2 hours + 35 minutes = 155 minutes
Since there are 60 minutes in 1 hour, we can convert the 155 minutes to hours by dividing it by 60:
155 minutes / 60 minutes/hour = 2.58 hours
Now, we can add this time to the time Eric fell asleep:
3:15 pm + 2.58 hours = 6:13 pm
Therefore, Eric woke up at 6:13 pm