Question

At what time will the train reach city X from city Y?
I. The train crosses another train of equal length of $200$ meters and running in opposite direction in $15$seconds.
II. The train leaves city Y at $7.15$ a.m. for city situated at a distance of $558$ km.
Ill. The $200$ meters long train crosses a signal pole in $10$ seconds.

• A. I only
• B. II only
• C. III only
• D. I or III only

Answer 1

The correct option is A I only

From the statement I,

we get length of the train is $200$ meters which is not required.

From Statement II,

we come to know the time at which the train leaves city Y. This is must to know the time at which it will reach City X. (knowing the time taken to cover the journey from Y to X)

From Statement III,

we can find the speed of the train.

From I and II,

we can know the speed of Y and the time required to cover $558$ km to reach X. So we will know the time at which the train will reach X city.

Hence Statement I is of no use and hence redundant.

option A