Answer:
Starting time = 11:43 pm last night
Step-by-step explanation:
The time that her train started from the station is as follows
Given that
Grandparents reached the place at 9:20AM
The travelled time is 9 hours and 37 mins i.e. 9:37 hours
Starting time = Reached time - journey time
Starting time = 9:20 am - 9:37 hrs
= 11:43 pm last night
