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Updated on: 07 Jul 2019, 01:30
Originally posted by rohan2345 on 17 Apr 2017, 06:26.
Last edited by Sajjad1994 on 07 Jul 2019, 01:30, edited 1 time in total.
Last edited by Sajjad1994 on 07 Jul 2019, 01:30, edited 1 time in total.
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (01:20) correct
11%
(01:10)
wrong
based on 167
sessions
History
Date
Time
Result
Not Attempted Yet
Cars X and Y leave City A at the same time and travel the same route to City B. Car X takes 30 minutes to complete the trip and car Y takes 20 minutes. Which of the following must be
true?
I. The average miles per hour at which car X traveled was greater than the average miles
per hour at which car Y traveled.
II. The distance between the cities is 30 miles.
III. The average miles per hour at which car Y traveled was greater than the average miles
per hour at which car X traveled.
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
true?
I. The average miles per hour at which car X traveled was greater than the average miles
per hour at which car Y traveled.
II. The distance between the cities is 30 miles.
III. The average miles per hour at which car Y traveled was greater than the average miles
per hour at which car X traveled.
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
Source: Nova GMAT
Difficulty Level: 550
Difficulty Level: 550
Updated on: 20 Dec 2019, 08:41
Originally posted by BrentGMATPrepNow on 17 Apr 2017, 07:25.
Last edited by BrentGMATPrepNow on 20 Dec 2019, 08:41, edited 1 time in total.
Last edited by BrentGMATPrepNow on 20 Dec 2019, 08:41, edited 1 time in total.
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rohan2345
I. The average miles per hour at which car X traveled was greater than the average miles per hour at which car Y traveled.
We're told that Car X takes 30 minutes to complete the trip, and Car Y takes 20 minutes.
If Car Y takes LESS TIME to complete the trip, it must be the case that Car Y's SPEED IS GREATER than Car X's speed.
So, statement I is FALSE
ELIMINATE A, D and E
II. The distance between the cities is 30 miles.
Since we don't know the speed of either car, we can't conclude that the distance is 30 miles.
For example, the distance COULD be 60 miles. If Car X's speed were 120 miles per hour, then its travel time would be 30 minutes, and if Car Y's speed were 180 miles per hour, then its travel time would be 20 minutes.
Since this scenario (in which the distance between the cities is 60 miles) meets the given conditions, we can conclude that statement II is FALSE
ELIMINATE B
By the process of elimination, the correct answer is ....
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17 Apr 2017, 08:07
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rohan2345
700 level - no way. It gives you two statements I and III opposite to each other, allowing you to eliminate choices without any efforts.
Distance is SAME and time spent is different..
Clearly one travelling in LESS time has more speed
So car Y is traveling faster. Hence III is correct and I is wrong.
Only possibility is C
