Lessons

General Aptitude
14.2 Boats and Streams - Data Sufficiency 1

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Q.

 

A boat takes a total time of three hours to travel downstream from P and Q and upstream back from Q to P. What is the speed of the boat in still water?

I. 

The speed of the river current is 1 km per hour.

 II. 

The distance between P and Q is 4 km.

View Answer

Correct choice: D

Explanation:

I. Speed of the current = 1 km/hr.

II. PQ = 4 km.

Let the speed of the boat in still water be x km/hr. Then,

4 + 4 = 3. This gives x.
(x + 1) (x - 1)

∴ Correct answer is (E).

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