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23 Jul 2023, 03:09
Kudos
Bookmarks
Distance travelled by bullet train in 10 minutes = 240*10/60=40 Miles
Distance left to travel =300-40=260 miles
Relative speed = Speed of bullet train+speed of train=240+160=400
Total time taken to pass each other= distance/relative speed=260/400=0.65 hours=39 minutes
Therefore time at which train cross each other = 12.10 pm + 39 minutes=12.49 pm
Hence Answer is B
Distance left to travel =300-40=260 miles
Relative speed = Speed of bullet train+speed of train=240+160=400
Total time taken to pass each other= distance/relative speed=260/400=0.65 hours=39 minutes
Therefore time at which train cross each other = 12.10 pm + 39 minutes=12.49 pm
Hence Answer is B
24 Jul 2023, 04:12
Kudos
Bookmarks
buckkitty
Train KT:
distance = rate × time
distance = 240t [This is the distance covered until they pass each other.]
Train TK:
time = t – 1/6 [Because this train leaves 10 minutes = 1/6 hours later, this train travels for 1/6 hours less time until they pass each other.]
distance = 160(t – 1/6) [This is the distance covered until they pass each other.]
The total distance they cover is the sum of their individual distances:
240t + 160t – 160/6 = 300
400t = 1960/6
t = 1960/[(6)(400)] hours = (1960)(60)/[(6)(400)] minutes
t = 49 minutes
Since train KT leaves at 12 noon, they will pass each other at:
12 noon + 49 minutes = 12:49pm
Answer: B
06 Sep 2025, 05:26
Kudos
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