1.  In what time will a train 100 metres long cross an electric pole, if it's speed be 144 km / hr ?
A. 2.5 seconds
B. 4.25 seconds
C. 5 seconds
D. 12.5 seconds

Answer: Option A

Explanation:

Speed = 144 x 5 m/sec = 40 m/sec.
18

Time taken = 100 sec = 2.5 sec.
40