Directions: The following questions are accompanied by three statements (A) or (b), (B) or (II), and (C) or (III). You have to determine which statement(s) is/are sufficient/necessary to answer the questions. A train crosses another train in 10 sec. Find out the lengths of the trains. A. Ratio between the lengths the of second and first train is 4:5. B. Ratio between the speed of first and second trains is 1:2 C. The speed of first train is 36 km/hr.