# Easy Time, Speed & Distance Solved QuestionAptitude Discussion

 Q. Two identical trains $A$ and $B$ running in opposite direction at same speed tale 2 min to cross each other completely. The number of bogies of $A$ are increased from 12 to 16. How much more time would they now require to cross each other?
 ✖ A. 40 sec ✖ B. 50 sec ✖ C. 60 sec ✔ D. 20 sec

Solution:
Option(D) is correct

Total initial bogies is $12+12 = 24$

Additional bogies $= 16−12 = 4$

24 bogies take 2 minutes.

4 bogies will take:

$=\dfrac{2\times 60}{24}\times 4$

20 sec.