How long does a train 140 m long running at the speed of 72 km/hr takes to cross a bridge 132 m length? Pick.
A) 13.6 sec
B) 12.1 sec
C) 17.9 sec
D) 16.8 sec
E) 14.9 sec

Rationale: "speed = 72 * 5 / 18 = 20 m / sec total distance covered = 140 + 132 = 272 m . required time = 272 / 20 = 13.6 sec . answer : a"
Answer: A