The distance between two stations,Delhi and Amritsar,is $450 \, km$. $A$ train starts at $4 \, p.m.$ from Delhi and moves towards Amritsar at an average speed of $60 \, km/hr$. Another train starts from Amritsar at $3:20 \, p.m.$ and moves towards Delhi at an average speed of $80 \, km/hr$. At what time will the two trains meet?
- A$5:30 \, p.m.$
- B$5:50 \, a.m.$
- C$6:50 \, p.m.$
- D$6:30 \, a.m.$
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