A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 150 m long?	Pick:  A) 38 sec  B) 35 sec  C) 44 sec  D) 40.8 sec  E) none of these

Rationale: "speed = 45 km / hr = 45 ã — ( 5 / 18 ) m / s = 150 / 12 = 50 / 4 = 25 / 2 m / s total distance = length of the train + length of the platform = 360 + 150 = 510 meter time taken to cross the platform = 510 / ( 25 / 2 ) = 510 ã — 2 / 25 = 40.8 seconds answer : d"
Answer: D