Lessons

General Aptitude
14.2 Boats and Streams - Data Sufficiency 1

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Q.

What is the speed of the boat in still water?

I. 

It takes 2 hours to cover the distance between A and B downstream.

 II. 

It takes 4 hours to cover the distance between A and B upstream.

View Answer

Correct choice: C

Explanation:

Let AB = x km.

 I. Speed downstream = x km/hr
2
II. Speed upstream = x km/hr.
4
Speed of boat in still water = 1 x + x km/hr.
2 2 4

Thus, I and II both even do not give the answer.

∴ Correct answer is (D).

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