In the following question, three statements are given. You have to find which is/are necessary and sufficient to answer the following question.
Find the speed of the boat in still water.
Statement I: The boat goes twice the distance downstream in the same time, as it goes upstream.
Statement II: Speed of the boat in still water is three times the speed of the current.
Statement III: The boat goes 840 meters in 1 hour 10 minutes downstream.1
All the statements are required to answer the question.
2
Any two statements are sufficient to answer the question.
3
Either statement I or II and statement III are required to answer the question.
4
Statement I and III together are sufficient to answer the question.
5
Statement II and III together are sufficient to answer the question.