It is currently 12 Nov 2018, 16:09
My Tests

Close

GMAT Club Daily Prep

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.

Half an hour after car A started traveling from Newtown to

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 4864
Followers: 74

Kudos [?]: 964 [0], given: 4466

CAT Tests
Half an hour after car A started traveling from Newtown to [#permalink] New post 13 Sep 2017, 12:58
Expert's post
00:00

Question Stats:

66% (00:46) correct 33% (07:09) wrong based on 6 sessions



Half an hour after car A started traveling from Newtown to Oldtown, a distance of 62 miles, car B started traveling along the same road from Oldtown to Newtown. The cars met each other on the road 15 minutes after car B started its trip. If car A traveled at a constant rate that was 8 miles per hour greater than car B’s constant rate, how many miles had car B driven when they met?

(A) 14

(B) 12

(C) 10

(D) 9

(E) 8
[Reveal] Spoiler: OA

_________________

Get the 2 FREE GREPrepclub Tests

1 KUDOS received
Director
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 1

Kudos [?]: 327 [1] , given: 66

Re: Half an hour after car A started traveling from Newtown to [#permalink] New post 29 Oct 2017, 01:56
1
This post received
KUDOS
Let's see which information we have. Car A has traveled 45 minutes at a speed 8m/h greater than car B speed (x). Car B traveled 15 minutes at speed x m/h.

Since they meet along a road 62 km long, it must be that the distance the two cars traveled sum to 62. Thus, we can proceed by plugging-in the choices we have and check if they do the job. Let's start from the middle one, C = 10 m.

If car B would have traveled 10 m, its speed would have been 10/(1/4) = 40 m/h (15 minutes is 1/4 of hour). Thus, car A speed would have been 48 m/h and it would have been traveled for 48*(3/4) = 24 m. Then, 10m+24m = 34m < 62 m. Thus, choice C is not our answers. We have to look for something higher.

If we proceed with this same kind of check we get that if car B traveled for 14m, then its speed is 14/(1/4) = 56 m/h so that car B speed is 64 m/h and it traveled for 48m, which summed to 14 gives us 62, the length of the road.

Answer A
1 KUDOS received
Manager
Manager
Joined: 01 Apr 2017
Posts: 61
WE: Analyst (Computer Software)
Followers: 0

Kudos [?]: 60 [1] , given: 27

Re: Half an hour after car A started traveling from Newtown to [#permalink] New post 03 Nov 2017, 13:19
1
This post received
KUDOS
Total traveling time for car A = 45 min or 3/4 hour.
Let the speed of car B be x miles/hour.
So, car's A speed = (8+x) miles/hour
Total distance covered by car A and car B is 62 miles.

Therefore, the equation is 3/4*(8+x) + 1/4*x = 62
x = 56
Distance traveled by car B = 1/4*x = 1/4 *56 = 14
Re: Half an hour after car A started traveling from Newtown to   [#permalink] 03 Nov 2017, 13:19
Display posts from previous: Sort by

Half an hour after car A started traveling from Newtown to

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.