A 1200 m long train crosses a tree in 120 sec, how much time will I take to pass a platform 800 m long?	Choose the correct choice from the following options:
A) 266 sec B) 200 sec C) 776 sec D) 166 sec E) 997 sec

Rationale: "l = s * t s = 1200 / 120 s = 10 m / sec . total length ( d ) = 2000 m t = d / s t = 2000 / 10 t = 200 sec answer : b"
Answer: B