A train 140 m long is running at 60 kmph. In how much time wiU it pass a platform 260 m long? Choose the correct choice from the following answers:
A) 21 sec
B) 22 sec
C) 23 sec
D) 24 sec
E) 26 sec

Rationale: "s = d / t d = 140 + 260 = 400 m s = 60 * 5 / 18 m / sec = 50 / 3 m / sec t = 400 / ( 50 / 3 ) = 1200 / 50 = 24 sec answer : d"
Answer: D