Lessons

General Aptitude
19.2 Time and Distance - Data Sufficiency 1

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Q.

Two towns are connected by railway. Can you find the distance between them?

I. 

The speed of the mail train is 12 km/hr more than that of an express train.

 II. 

A mail train takes 40 minutes less than an express train to cover the distance.

View Answer

Correct choice: D

Explanation:

Let the distance between the two stations be x km.

 I. Then, speed of the mail train = (y + 12) km/hr.

II. x - x = 40 .
y (y + 12) 60

Thus, even I and II together do not give x.

∴ Correct answer is (D).

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