How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 132 m length Choose the correct choice from the following choices.
A) 12	B) 12.1	C) 13	D) 14	E) 15

Rationale: "speed = 72 * 5 / 18 = 20 m / sec total distance covered = 110 + 132 = 242 m . required time = 242 / 20 = 12.1 sec . answer : option b"
Answer: B