A.  48 km/hr

B.  54 km/hr

C.  66 km/hr

D.  82 km/hr

1
Correct Answer :
82 km/hr
Explanation :

Let the speed of the second train be x km/hr

Relative speed = (x + 50) km/hr

= [ (x + 50) x (5/18) ] m/sec

= [ (250 + 5x) / 18 ] m/sec

Distance covered = (108 + 112) = 220 m

=> 200 / [ (250 + 5x) / 18 ] = 6

=> 250 + 5x = 600

=> x = 82 km/hr


Interview Questions

MongoDB
Java Script
Node JS
PHP
JQuery
Python