In what time will a train 120 m long cross an electric pole, it its speed be 121 km/hr?
Choose the correct choice from the following answers: A) 2.5 B) 2.7 C) 2.9 D) 3.6 E) 2.1
Speed = 121 * 5/18 = 33.6 m/sec   Time taken = 120/33.6   = 3.6 sec.   Answer: 3.6
<result>D</result>
In what time will a train 120 m long cross an electric pole, it its speed be 121 km/hr?