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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

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:

WHile on a straight road, car X and Y are travelling at [#permalink]
13 Oct 2008, 04:36

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct
0% (00:00) wrong based on 0 sessions

The question is:

WHile on a straight road, car X and Y are travelling at different constant rates. If car X is now 1 mile ahead of car Y, how many minutes from now will car X be 2 miles ahead of Car Y? 1. car X is travelling at 50 mph and car Y is travelling at 40 mph

2. 3 minutes ago, car X was 1/2 mile ahead of car Y.

My problem is, while it makes logical sense in my head that both will be individually be enough to answer the question, I am not sure, because I can not reach the answer using the second statement.

Re: DS- Cars on a road! [#permalink]
13 Oct 2008, 10:11

Let's say after certain time T, the two cars are 2 miles apart. In this time T, the distance travelled by car X = D1 and in the same Time T, distance travelled by car Y = D2 We know D(x) - D(y) = 2 => D(y) = D(x) + 2

Lets take case 1) Car X is speeding at 50MPH Car Y is speeding at 40MPH

Re: DS- Cars on a road! [#permalink]
13 Oct 2008, 21:35

Thanks Smahmkl and shahthakur.

The correct answer is actually D. Both statements are individually correct.

Intuitively, that's what I thought as well..

But could somebody shed mroe light on it, by arriving at the answer mathematically, from the second statement.

Please taht would hlep me understand it better.

he question is:

WHile on a straight road, car X and Y are travelling at different constant rates. If car X is now 1 mile ahead of car Y, how many minutes from now will car X be 2 miles ahead of Car Y? 1. car X is travelling at 50 mph and car Y is travelling at 40 mph

2. 3 minutes ago, car X was 1/2 mile ahead of car Y.

Re: DS- Cars on a road! [#permalink]
13 Oct 2008, 21:42

hbs2012 wrote:

Thanks Smahmkl and shahthakur.

The correct answer is actually D. Both statements are individually correct.

Intuitively, that's what I thought as well..

But could somebody shed mroe light on it, by arriving at the answer mathematically, from the second statement.

Please taht would hlep me understand it better.

he question is:

WHile on a straight road, car X and Y are travelling at different constant rates. If car X is now 1 mile ahead of car Y, how many minutes from now will car X be 2 miles ahead of Car Y? 1. car X is travelling at 50 mph and car Y is travelling at 40 mph

2. 3 minutes ago, car X was 1/2 mile ahead of car Y.

I opted to do my Team-Based Discussion (TBD) and interview in London with a member of the Admissions office. It was a benefit to have been through the...

After so many confusing thoughts, I decided to write this post. I am yet to finalize the list of B-Schools I am applying to. For a background check, I...