Speed of train = 88feet/sec = (88x60)feet/min
=> (88x60x)/5280] mile/ min
=> 1mile/ min

Statement 1) It took less than 45min. Train could have reached after 39 min (travelling 39 miles) or after 41mins (travelling 41miles) .. Insufficient
Statement 2) It took more than 42min. The train travelled more than 42miles .. Sufficient

Choice B) alone is sufficient to ans the question.

Good luck
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Converting the speed to mile/hr:-

88*60*60/5280= 60 miles/hr

(1) It took less than 45 minutes for the train to travel from station X to Station Y.

distance = speed*time

since time <45 minutes, distance will be <60*45/60, i.e. <45.

But it may or may not be <40 miles.

(2) It took more than 42 minutes for the train to travel from station X to Station Y

distance> 60*42/60 i.e. >42.

Sufficient.

B is the answer
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just divide 5280 by 88, and you will get number of seconds the train needs to cover 1 mile. that's it...

hope this helps
cheers ...

We can let d = the distance between station X and station Y. We need to determine whether d > 40 miles.
Since the distance is given in miles but the speed, or rate, is given in feet per second, we need to convert the distance from miles to feet. Since 1 mile = 5,280 feet, 40 miles = 40 x 5,280 = 211,200 feet.

Since rate x time = distance and we have a rate of 88 ft/s, we can change the question to:

Is 88t > 211,200 feet?

Is t > 2,400 seconds?

Since 2,400 seconds = 2,400/60 = 40 minutes, the question becomes:

Is t > 40 minutes?

Statement One Alone:

It took less than 45 minutes for the train to travel from station X to Station Y.

Since less than 45 minutes could mean 42 minutes or 38 minutes, statement one does not tell us whether t > 40 minutes. Statement one alone is not sufficient to answer the question.

Statement Two Alone:

It took more than 42 minutes for the train to travel from station X to Station Y.

Statement two tells us that t is greater than 40 minutes.

Answer: B
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