A train 125 m long passes a person, running at 5 km/hr in the same direction in which that the train is going, in 10 seconds. The speed of the train is: Choose the correct option.
A) 40 km/hr
B) 60 km/hr
C) 55 km/hr
D) 50 km/hr
E) 65 km/hr
speed of train related to a person = 125/10 m/s   =&gt;25/2   (25/2*18/5) km/hr   =45 km/hr   so speed consider as x and relative speed consider (x-5)   x-5 = 45 =&gt; x = 50 km/hr   ANSWER 50 km/hr
<result>D</result>
A train 125 m long passes a person, running at 5 km/hr in the same direction in which that the train is going, in 10 seconds. The speed of the train is: