In what time will a train 120 meters long cross an electric pole, if its speed is 184 km/hr	Select the correct option.
A) 5 seconds
B) 4.5 seconds
C) 3 seconds
D) 2.3 seconds
E) None of these
Explanation:   First convert speed into m/sec   Speed = 184*(5/18) = 51 m/sec   Time = 2.3 secondsistance/speed   = 120/51 = 2.3 seconds   Option 2.3 seconds
<result>D</result>
In what time will a train 120 meters long cross an electric pole, if its speed is 184 km/hr