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

It is currently 18 Jan 2019, 06:24

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
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • Free GMAT Strategy Webinar

     January 19, 2019

     January 19, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.
  • FREE Quant Workshop by e-GMAT!

     January 20, 2019

     January 20, 2019

     07:00 AM PST

     07:00 AM PST

    Get personalized insights on how to achieve your Target Quant Score.

John can shovel a driveway in 50 minutes. If Mary can shovel the drive

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

Hide Tags

 
SVP
SVP
User avatar
V
Status: Preparing GMAT
Joined: 02 Nov 2016
Posts: 2032
Location: Pakistan
GPA: 3.39
Premium Member CAT Tests
John can shovel a driveway in 50 minutes. If Mary can shovel the drive  [#permalink]

Show Tags

New post 20 Dec 2018, 13:30
1
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

91% (00:25) correct 9% (00:38) wrong based on 35 sessions

HideShow timer Statistics

John can shovel a driveway in 50 minutes. If Mary can shovel the driveway in 20 minutes, how long will it take them, to the nearest minute, to shovel the driveway if they work together?

A. 12
B. 13
C. 14
D. 16
E. 18

_________________

Final days of the GMAT Exam? => All GMAT Flashcards.
This Post Helps = Press +1 Kudos
Best of Luck on the GMAT!!

GMAT Tutor
User avatar
G
Status: Tutor - BrushMyQuant
Joined: 05 Apr 2011
Posts: 622
Location: India
Concentration: Finance, Marketing
Schools: XLRI (A)
GMAT 1: 700 Q51 V31
GPA: 3
WE: Information Technology (Computer Software)
Re: John can shovel a driveway in 50 minutes. If Mary can shovel the drive  [#permalink]

Show Tags

New post 21 Dec 2018, 21:36
1
Top Contributor
Since both of them are trying to do the same work so the work done can be taken as 1 in this case.
Using, Rate * time = Work

John's Rate, R(J) = Work / Time = 1/50
Mary's Rate, R(M) = Work / time = 1/20

If they are working together then their rates will be added up. So, combined Rate = R(J) + R(M) = 1/50 + 1/20 = 2/100 + 5/100 = 7/100

Time taken by both working together = Work / Rate = 1/ (7/100) = 100/7 min = 14.3 mins
So, answer will be C.

Hope it helps!

SajjadAhmad wrote:
John can shovel a driveway in 50 minutes. If Mary can shovel the driveway in 20 minutes, how long will it take them, to the nearest minute, to shovel the driveway if they work together?

A. 12
B. 13
C. 14
D. 16
E. 18

_________________

Ankit

Check my Tutoring Site -> Brush My Quant

GMAT Quant Tutor
How to start GMAT preparations?
How to Improve Quant Score?
Gmatclub Topic Tags
Check out my GMAT debrief

How to Solve :
Statistics || Reflection of a line || Remainder Problems || Inequalities

GMAT Club Bot
Re: John can shovel a driveway in 50 minutes. If Mary can shovel the drive &nbs [#permalink] 21 Dec 2018, 21:36
Display posts from previous: Sort by

John can shovel a driveway in 50 minutes. If Mary can shovel the drive

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


Copyright

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®.