A train crosses a platform of 110 m in 15 sec, same train crosses another platform of length 250 m in 20 sec. then find the length of the train?	Choose the correct choice from the following answers
A) 150	B) 88	C) 77	D) 310	E) 52

Rationale: "length of the train be â € ˜ x â € ™ x + 110 / 15 = x + 250 / 20 4 x + 440 = 3 x + 750 x = 310 m answer : d"
Answer: D