Kinematics Question 387
Question: Two trains are each 50 m long moving parallel towards each other at speeds $ 10m/s $ and 15 m/s respectively. After what time will they pass each other?
Options:
A) $ 5\sqrt{\frac{2}{3}}sec $
B) $ 4sec $
C) $ \text{2 }sec $
D) $ \text{6 }sec $
Show Answer
Answer:
Correct Answer: B
Solution:
Relative speed of each train with respect to each other be, $ v=10+15=25m/s $ Here distance covered by each train = sum of their $ lengths=50+50=100m $
$ \therefore $ Required time = $ \frac{100}{25}=4\text{ sec}\text{.} $
