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Question 66
A and B are two railway stations 90 km apart. A train leaves A at 9:00 am, heading towards B at a speed of 40 km/hr. Another train leaves B at 10:30 am, heading towards A at a speed of 20 km/hr. The trains meet each other at
Solution
The distance travelled by A between 9:00 Am and 10:30 Am is 3/2*40 =60 km.
Now they are separated by 30 km
Let the time taken to meet =t
Distance travelled by A in time t + Distance travelled by B in time t = 30
40t + 20t =30 => t=1/2 hour
Hence they meet at 11:00 AM
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