Time and Distance - Arithmetic Aptitude Questions and Answers

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

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.

I alone sufficient while II alone not sufficient to answer

II alone sufficient while I alone not sufficient to answer

Either I or II alone sufficient to answer

Both I and II are not sufficient to answer

Both I and II are necessary to answer

Answer : Option D

Explanation :

Let the distance between the two stations be x km.

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

II.\( \frac { X } { Y } \)-\( \frac { X } {( Y+12 )} \)=\( \frac { 40} {60 }\)