Two identical trains take 3 sec to pass one another when going in the opposite direction but only 2.5 sec if the speed of one is increased by 50 %. Find the time (in sec) one would take to pass the other when going in the same direction at their original speed.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION
(15)
Sol.
t 1 = 3 = 
⇒ v 1 + v 2 = 
...........(i)
t 2 = 2.5 = 
1.5 v 1 + v 2 = 
...........(ii)
by (i) and (ii)
v 1 = 
; v 2 = 
Now t 3 = 
= 
= 15 sec.
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