(A) 45 km/hr
(B) 50 km/hr
(C) 54 km/hr
(D) 55 km/hr
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(A) 45 km/hr
(B) 50 km/hr
(C) 54 km/hr
(D) 55 km/hr
Answer: Option (B) 50 km/hr
Explanation:
Speed of the train relative to man = 125 m/sec
10
= 25 m/sec.
2
= 25 x 18 km/hr
2 5
= 45 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x – 5) km/hr.
x – 5 = 45 x = 50 km/hr.