Answer:
Bus A will take 75 minutes and Bus B will take 75 minutes as well.
Step-by-step explanation:
Say the buses start at 8 am and the first stop is 25 of 15 minutes, whenever they're supposed to stop:
Bus A: 8:25, 8:50, and 9:15
Bus B: 8:15, 8:30, 8:45, 9:00, and 9:15.
I hope this helped!