GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Aug 2018, 01:30

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.

Close

Request Expert Reply

Confirm Cancel

Alex and Brenda both stand at point X. Alex begins to walk a

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
avatar
G
Joined: 27 Jan 2016
Posts: 145
Schools: ISB '18
GMAT 1: 700 Q50 V34
Re: Alex and Brenda both stand at point X. Alex begins to walk a  [#permalink]

Show Tags

New post 18 Jul 2017, 04:44
Marcab wrote:
Can you please let me know where am I committing mistake?
Alex already covered 4 miles. In the next t hours the total distance covered by Alex will be 4+4t.
Similarly Brenda covers Rt miles in the next t hours.
Therefore, Rt=2(4+4t)t
t=8/(R-8)


Even i committed the same mistake, you have considered the time, which Brenda has spent commuting, but the question asks the amount of time,Alex has spent walking, which is 1 hr more than what brenda has spent

so 8/r-8 +1 = r/r-8
Intern
Intern
avatar
Joined: 24 Mar 2017
Posts: 1
Re: Alex and Brenda both stand at point X. Alex begins to walk a  [#permalink]

Show Tags

New post 23 Jun 2018, 16:30
Let T be the time in which Brenda completed twice the distance as Alex.
D(A) = Distance Traveled by Alex in time T = 4*T = 4T
D(B) = Distance Traveled by Brenda in time T=> since Brenda started an hour later, it will be T-1. Distance Traveled = R*(T-1)

Now, per details in Question,
2* D(A) = D(B)
=> 2* 4T= R(T-1)
=> 8T = RT - R
=> T(R-8)=R
=> T= R/(R-8) {Option C}
Re: Alex and Brenda both stand at point X. Alex begins to walk a &nbs [#permalink] 23 Jun 2018, 16:30

Go to page   Previous    1   2   3   [ 43 posts ] 

Display posts from previous: Sort by

Alex and Brenda both stand at point X. Alex begins to walk a

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.