Question

trains leave the station a and b simultaneously after an interval of every one hour each train take 4 hour to complete the journey of person start from station A to B how many train will he cross

Answer 1

4a+4b=180°
8b=180°
b=22.5

Answer 2

If the person starts at 7am from A, he will cross the trains starting from B at 4am, 5am, 6am, 7am, 8am, 9am, 10am.