Directions: The following question is accompanied by statements (I), (II) and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the question. What is the length of train, if speed of train is 90 kmph? Statements: I. Train crosses bridge in 18 seconds. II. Train crosses another train of same length, coming from opposite direction, in 9 seconds. III. Length of bridge is 50 m more than the train.