How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 112 m length? Choose one
A) 82.1 sec
B) 12.1 sec
C) 16.1 sec
D) 11.1 sec
E) 12.15 sec

Rationale: "speed = 72 * 5 / 18 = 20 m / sec total distance covered = 110 + 112 = 222 m . required time = 222 / 20 = 11.1 sec . answer : d"
Answer: D