The following questions are accompanied by three statements (I), (II), and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the questions.
How much time will the train M take to cross another train N of same length running in opposite direction?
Statement I: Length of two trains together is 480 m.
Statement II: Train M crosses a signal pole in 10 seconds.
Statement III: The ratio of the speed of the trains M and N is 3 : 4.
1
Only I and II
2
Only II and III
3
Only I and III
4
All I, II and III together
5
All the given statements are insufficient