A train leaves Delhi at 6 am and reaches Chandigarh at 10 am. Another train leaves Chandigarh at 8 am and reaches delhi at 11:30 am. At what time do the two trains cross one another ?
A. 9:26 am
B. 9:00 am
C. 8:36 am
D. 8:56 am
E. 9:56 am
Answer: Option D
Solution(By Examveda Team)
Suppose distance between Delhi and Chandigarh is 28 kms.
Then speed of first train = 28/4= 7 kmph
speed of 2nd train = 28/3.5= 8 kmph
If trains met after t hours from 6 AM, then
7t + 8*(t-2) = 28
15t = 44
t = 44/16 hours = 2 hrs 56 mins.
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What makes you suppose exactly 28