Answer:
Dina swam for 37 minutes
Explanation:
Dina started swimming at 3:38 p.m
There are 60 minutes in a hour so 60 - 38 = 22
22 is the remaining time in the hour she swam
She swam until 4:15 p.m.
She swam 15 minutes pass the hour
Total Time: 22 minutes + 15 minutes = 37 minutes