In what time will a train 135 m long cross an electric pole, it its speed be 140 km/hr?  Choices
A) 3.5
B) 2.7
C) 2.9
D) 2.3
E) 2.1
Speed = 140 * 5/18 = 38.8 m/sec   Time taken = 135/38.8   = 3.5 sec.   3.5nswer: 3.5
<result>A</result>
In what time will a train 135 m long cross an electric pole, it its speed be 140 km/hr?