In what time will a train 120 m long cross an electric pole, it its speed be 185 km/hr?  Choose the correct answer.
A) 2.3 sec  B) 2.9 sec  C) 2.7 sec  D) 8.7 sec  E) 8.5 sec
Speed = 185 * 5/18 = 51 m/sec   Time taken = 120/51 = 2.3 sec.   2.3 secnswer: 2.3 sec
<result>A</result>
In what time will a train 120 m long cross an electric pole, it its speed be 185 km/hr?