BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Time & Work

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Senior | Next Rank: 100 Posts
Posts: 74
Joined: Tue Nov 09, 2010 11:33 pm
by sukh » Fri Aug 19, 2011 7:08 am
If 3 men or 4 women can build a wall in 43 days , then in how many days can 7 men and 5 women build this wall. Explain with formulae etc - Does Ratio MDH/W apply where M is Men , D is Days H is hours , W is Work
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Quantitative Reasoning |
User avatar
Senior | Next Rank: 100 Posts
Posts: 64
Joined: Sun Jul 24, 2011 9:11 am
Thanked: 13 times
GMAT Score:610

by sumgb » Sat Aug 20, 2011 7:13 am
Let's call rate of 1 Man = Rm and
rate of 1 Woman = Rw

We know, Rate * Time = Work

Here, 3Rm (43) = 1 and 4Rw (43) = 1 So,
Rm = 1 / (3 * 43) and Rw = 1 / (4 * 43)

Combined rate of 7 Men = 7 / (3 * 43)
Combined rate of 5 Women = 5 / (3 * 43)

So combined rate of 7 men and 5 women, Rc = 7 / (3 * 43) + 5 / (3 * 43)
which is 1 / 12

so, since RT = W; (1 / 12) * T = 1 so time taken by 7men and 5women = 12 Days.

Hope this helps...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 407
Joined: Tue Jan 25, 2011 9:19 amFollowed by: 7 members
Thanked: 25 times

by Ozlemg » Sat Aug 20, 2011 1:11 pm
sumgb wrote:Let's call rate of 1 Man = Rm and
rate of 1 Woman = Rw

We know, Rate * Time = Work

Here, 3Rm (43) = 1 and 4Rw (43) = 1 So,
Rm = 1 / (3 * 43) and Rw = 1 / (4 * 43)

Combined rate of 7 Men = 7 / (3 * 43)
Combined rate of 5 Women = 5 / (4 * 43)

So combined rate of 7 men and 5 women, Rc = 7 / (3 * 43) + 5 / 4 * 43)
which is 1 / 12

so, since RT = W; (1 / 12) * T = 1 so time taken by 7men and 5women = 12 Days.

Hope this helps...
Very good explanation. there is a little typo
The more you suffer before the test, the less you will do so in the test! :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Senior | Next Rank: 100 Posts
Posts: 64
Joined: Sun Jul 24, 2011 9:11 am
Thanked: 13 times
GMAT Score:610

by sumgb » Sat Aug 20, 2011 2:20 pm
Thanks Ozlemg, lazy cut and paste on my behalf!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 1
Joined: Wed Aug 31, 2011 7:39 am

by leojames » Wed Aug 31, 2011 7:44 am
Could you please explain how did you come up with

7 / (3 * 43) + 5 / 4 * 43)

= 1/12 ?

Thanks for your help.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 1255
Joined: Fri Nov 07, 2008 2:08 pmFollowed by: 90 members
Location: St. Louis
Thanked: 312 times

by Tani » Thu Sep 01, 2011 6:42 am
Get your lowest common denominator = 3*4*43

then (7*4)/(3*4*43) = (5*3)/(3*4*43) = 28/(3*4*43) + 15/(3*4*43) = 43/(*3*4*43) = 1/12
Tani Wolff
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1