Direction: Following question consists of a question followed by three statements I, II and III. You have to study the question and the statements and decide which of the statements (s) is/are necessary to answer the question.
What is the speed of boat in still water?
I. The boat covers 12 km in 2 hours in downstream.
II. The boat covers same distance in 4 hours in upstream.
III. The speed of steam is one third of that of boat in still water.1
Both I and II
2
I and either II or III
3
All I, II and III
4
Question cannot be answered even with the information in all three statements.
5
None of these