Two brothers A and B want to go on a trip from their house to Jaipur. A started his journey from his house at 12:00 AM at a speed of 66 km/hour. Then B leaves for Jaipur from his house at 12:30 AM. To catch up with A in 3 hours what should be the speed of B
1
55 km/hr
2
60 km/hr
3
70 km/hr
4
77 km/hr
5
None of these