(A) 48 km/hr
(B) 54 km/hr
(C) 66 km/hr
(D) 82 km/hr
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(A) 48 km/hr
(B) 54 km/hr
(C) 66 km/hr
(D) 82 km/hr
Answer: Option (D) 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.
Therefore 220/((250+5x)/18) = 6
=> 250 + 5x = 660
=> x = 82 km/hr.