A question and two statements labeled (I), (II) are given. You have to decide which statement(s) is/are sufficient to answer the question.
What is the speed of boat in still water?
I. The boat covers a distance of 180 km downstream in 10 hours and covers the same distance upstream in 15 hours.
II. The upstream speed of the boat is 12 km/hr and the speed of the current is 3 km/hr.
1
Neither I nor II is sufficient.
2
Only II is sufficient.
3
Only I is sufficient.
4
Either I or II is sufficient.