Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

WE: General Management (Non-Profit and Government)

Cars X and Y leave City A at the same time and travel the same route
[#permalink]

Show Tags

17 Apr 2017, 06:26

00:00

A

B

C

D

E

Difficulty:

15% (low)

Question Stats:

81% (01:01) correct 19% (00:53) wrong based on 47 sessions

HideShow timer Statistics

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

Re: Cars X and Y leave City A at the same time and travel the same route
[#permalink]

Show Tags

17 Apr 2017, 07:25

Top Contributor

rohan2345 wrote:

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

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 ....

Re: Cars X and Y leave City A at the same time and travel the same route
[#permalink]

Show Tags

17 Apr 2017, 08:07

rohan2345 wrote:

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

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
_________________

Cars X and Y leave City A at the same time and travel the same route
[#permalink]

Show Tags

17 Apr 2017, 08:09

GMATPrepNow wrote:

rohan2345 wrote:

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

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 ....