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

It is currently 21 Sep 2018, 04:59

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

If Lucy walks to work at a rate of 4 miles per hour, but she walks hom

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

Hide Tags

Director
Director
User avatar
P
Joined: 13 Mar 2017
Posts: 619
Location: India
Concentration: General Management, Entrepreneurship
GPA: 3.8
WE: Engineering (Energy and Utilities)
If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post Updated on: 24 May 2017, 08:05
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

83% (00:56) correct 17% (00:23) wrong based on 63 sessions

HideShow timer Statistics

If Lucy walks to work at a rate of 4 miles per hour, but she walks home by the same route at a rate of 6 miles per hour, what is Lucy's average walking rate for the round trip?

A. 4.2 miles/hour
B. 4.4 miles/hour
C. 4.8 miles/hour
D. 5 miles/hour
E. 5.8 miles/hour

_________________

CAT 99th percentiler : VA 97.27 | DI-LR 96.84 | QA 98.04 | OA 98.95
UPSC Aspirants : Get my app UPSC Important News Reader from Play store.

MBA Social Network : WebMaggu


Appreciate by Clicking +1 Kudos ( Lets be more generous friends.)



What I believe is : "Nothing is Impossible, Even Impossible says I'm Possible" : "Stay Hungry, Stay Foolish".


Originally posted by shashankism on 24 May 2017, 07:00.
Last edited by Bunuel on 24 May 2017, 08:05, edited 2 times in total.
Renamed the topic, edited the question, options and OA.
Intern
Intern
avatar
B
Joined: 09 Oct 2016
Posts: 3
Re: If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post 24 May 2017, 07:10
4.8 miles/hour? I don't see this answer as an option. Is the question/options correct?

Sent from my A0001 using Tapatalk
CEO
CEO
User avatar
D
Joined: 12 Sep 2015
Posts: 2864
Location: Canada
If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post Updated on: 25 May 2018, 15:09
Top Contributor
shashankism wrote:
If Lucy walks to work at a rate of 4 miles per hour, but she walks home by the
same route at a rate of 6 miles per hour, what is Lucy's average walking rate for
the round trip?
A. 4 miles/hour
B. 5 miles/hour
C. 4.5 miles/hour
D. 5.5 miles/hour
E. 6 miles/hour


A quick approach is to assign a nice value to the distance from home to work.
That is, we want a distance that works well with the two speeds (4 mph and 6 mph)
Let's say the distance from home to work = 12 miles

Time TO work = distance/speed = 12/4 = 3 hours
Time FROM work = distance/speed = 12/6 = 2 hours
TOTAL time = 3 + 2 = 5 hours

TOTAL distance = 12 + 12 = 24 miles

Average speed = total distance/total time
= 24/5 miles per hour
= 4.8 miles per hour

Answer: C

RELATED VIDEO

_________________

Brent Hanneson – GMATPrepNow.com
Image
Sign up for our free Question of the Day emails


Originally posted by GMATPrepNow on 24 May 2017, 08:02.
Last edited by GMATPrepNow on 25 May 2018, 15:09, edited 2 times in total.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49298
Re: If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post 24 May 2017, 08:06
shashankism wrote:
If Lucy walks to work at a rate of 4 miles per hour, but she walks home by the same route at a rate of 6 miles per hour, what is Lucy's average walking rate for the round trip?

A. 4.2 miles/hour
B. 4.4 miles/hour
C. 4.8 miles/hour
D. 5 miles/hour
E. 5.8 miles/hour


Edited. As correctly noted above, the correct answer is 4.8 miles per hour.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Director
Director
User avatar
D
Joined: 04 Dec 2015
Posts: 701
Location: India
Concentration: Technology, Strategy
Schools: ISB '19, IIMA , IIMB, XLRI
WE: Information Technology (Consulting)
GMAT ToolKit User
If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post 24 May 2017, 08:07
Let Distance from home to work be D. (Distance from work to home is also same.)

Distance from home to work = D
Speed from home to work = 4 miles/hr
Time taken from home to work = Distance/Speed
Time = \(\frac{D}{4}\) hr

Distance from work to home = D
Speed from work to home = 6 miles/hr
Time taken from work to home = \(\frac{D}{6}\) hr

Average speed = \(\frac{Total Distance}{Total Time}\)

Total Distance = D + D = 2D
Total Time = \(\frac{D}{4}\) + \(\frac{D}{6}\) = \(\frac{5D}{12}\)
Average speed = \(\frac{2D}{{(5D/12)}}\) = \(\frac{2D * 12}{5D}\) = \(\frac{24}{5}\) = 4.8 miles/hr
Answer C...
Board of Directors
User avatar
P
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4031
Location: India
GPA: 3.5
WE: Business Development (Commercial Banking)
GMAT ToolKit User Premium Member
Re: If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post 24 May 2017, 08:11
shashankism wrote:
If Lucy walks to work at a rate of 4 miles per hour, but she walks home by the same route at a rate of 6 miles per hour, what is Lucy's average walking rate for the round trip?

A. 4.2 miles/hour
B. 4.4 miles/hour
C. 4.8 miles/hour
D. 5 miles/hour
E. 5.8 miles/hour


\(Average \ Speed = \frac{2*4*6}{(4 +6)}\)

Or, \(Average \ Speed = \frac{48}{10}\)

Or, \(Average \ Speed = 4.80\)

Thus, the answer must be (C) 4.8 miles/hour
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Director
Director
User avatar
P
Joined: 13 Mar 2017
Posts: 619
Location: India
Concentration: General Management, Entrepreneurship
GPA: 3.8
WE: Engineering (Energy and Utilities)
Re: If Lucy walks to work at a rate of 4 miles per hour, but she walks hom  [#permalink]

Show Tags

New post 24 May 2017, 20:23
Bunuel wrote:
shashankism wrote:
If Lucy walks to work at a rate of 4 miles per hour, but she walks home by the same route at a rate of 6 miles per hour, what is Lucy's average walking rate for the round trip?

A. 4.2 miles/hour
B. 4.4 miles/hour
C. 4.8 miles/hour
D. 5 miles/hour
E. 5.8 miles/hour


Edited. As correctly noted above, the correct answer is 4.8 miles per hour.


Thanks Bunuel.. The correct answer is 4.8 miles/hr..
Somehow while giving option I missed the original answer..
_________________

CAT 99th percentiler : VA 97.27 | DI-LR 96.84 | QA 98.04 | OA 98.95
UPSC Aspirants : Get my app UPSC Important News Reader from Play store.

MBA Social Network : WebMaggu


Appreciate by Clicking +1 Kudos ( Lets be more generous friends.)



What I believe is : "Nothing is Impossible, Even Impossible says I'm Possible" : "Stay Hungry, Stay Foolish".

Re: If Lucy walks to work at a rate of 4 miles per hour, but she walks hom &nbs [#permalink] 24 May 2017, 20:23
Display posts from previous: Sort by

If Lucy walks to work at a rate of 4 miles per hour, but she walks hom

  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®.