MBA Exam

two buses B1 and B2 depart from rohini and shahdara towards each other. B2 departs shahdara 30 mins after B1 departs from rohini. B1 after travelling for 2 hours, is separated from bus B2 by 19/30 of the distance between rohini and shahdara. If B1 reaches 1/2 hour later as compared to B2, how much time will each take to cover distance.i have done this equation using a single equation and a single variable.Is there any way to avoid equation.

1) 9 hours for B2 and 9 hours 30 mins for B1
2) 9 hours 30 mins for b2 and 10 hours for b1
3) 11 hours for b2 and 11 hours 30 mins for b1
4) 11 hours 30 mins for b2 and 12 hours for b1

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