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A certain train traveled from Station A to Station B. Was the train's

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A certain train traveled from Station A to Station B. Was the train's  [#permalink]

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New post 15 Aug 2016, 08:09
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A certain train traveled from Station A to Station B. Was the train's average speed on the trip less than 110 km per hour? (1km = 1000m)

(1) The train's average speed on the trip was greater than 25 meters per second.
(2) The train's average speed on the trip was less than 30 meters per second.
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Re: A certain train traveled from Station A to Station B. Was the train's  [#permalink]

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New post 15 Aug 2016, 08:31
1
Writing on My phone so apologies for not writing down actual numbers.

(1) speed iS higher than some number less than 110km/h. Allows for yes and no as an answer to the Q. Not sufficient.

(2) speed is lower than some number less than 110km/h. Clearly the speed can not be above 110km/h. Sufficient.

Answer: B

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Re: A certain train traveled from Station A to Station B. Was the train's  [#permalink]

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New post 17 Aug 2016, 00:21
Though easy at a glance, these kind of questions are super dangerous if throw at 35-37 slot, when time is short & tendency to undermine a question is high....
Loved the question though. +1 for B
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Re: A certain train traveled from Station A to Station B. Was the train's  [#permalink]

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New post 15 Sep 2016, 03:52
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HarveyKlaus wrote:
A certain train traveled from Station A to Station B. Was the train's average speed on the trip less than 110 km per hour? (1km = 1000m)

(1) The train's average speed on the trip was greater than 25 meters per second.
(2) The train's average speed on the trip was less than 30 meters per second.


Convert 110km/h in meters per second => (110*1000m)/3600seconds=110000/3600 ~ 30,6 m/s

So the questions is: Was the train's average speed less than 30,6m/s?

(1): Speed>25m/s. Not sufficient, it could be 26m/s when the answer is YES, or 35 m/s which means NO.

(2) Less than 30m/s. Sufficient, as 30m/s < 30,6 m/s so the train's speed was less than 30,6m/s.

Answer: B
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Re: A certain train traveled from Station A to Station B. Was the train's  [#permalink]

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New post 05 Sep 2019, 22:24
Hello from the GMAT Club BumpBot!

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Re: A certain train traveled from Station A to Station B. Was the train's   [#permalink] 05 Sep 2019, 22:24
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