A train crosses a platform of200 m in 15 sec, same train crosses another platform of length 300 m in 20 sec. then find the length of the train?
Choose the correct choice:
A) 100 m
B) 180 m
C) 159 m
D) 250 m
E) 152 m

Rationale: "length of the train be ‘ x ’ x + 200 / 15 = x + 300 / 20 4 x + 800 = 3 x + 900 x = 100 m answer : a"
Answer: A