1.  How long does a train 110 metres long running at the speed of 72 km / hr take to cross a bridge 132 metres in length ?
A. 9.8 sec
B. 12.1 sec
C. 12.42 sec
D. 14.3 sec

Answer: Option B

Explanation:

Speed = 72 x 5 m/sec = 20 m/sec.
18

Total distance covered = (110 + 132)m = 242 m.

Required time = 242 sec = 12.1 sec.
20