A train crosses a tunnel of 1200 m in 45 sec, same train crosses another platform of length 180 m in 15 sec. then find the length of the train? Choose the correct answer.
A) 350 m B) 400 m C) 272 m D) 330 m E) 267 m

Rationale: length of the train be ‘ x ’ ( x + 1200 ) / 45 = ( x + 180 ) / 15 x + 1200 = 3 x + 540 2 x = 660 x = 330 m answer : d
Answer: D