Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 2008:00 AM PDT
-08:30 AM PDT
What’s in it for you- Live Profile Evaluation Chat Session with Jenifer Turtschanow, CEO, ARINGO. Come with your details prepared and ARINGO will share insights! Pre-MBA Role/Industry, YOE, Exam Score, C/GPA, ECs Post-MBA Role/ Industry & School List.
May 1501:00 PM IST
-11:00 AM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.
May 1912:00 PM PDT
-01:00 PM PDT
Scoring 329 on the GRE is not always about using more books, more courses, or a longer study plan. In this episode of GRE Success Talks, Ashutosh shares his GRE preparation strategy, study plan, and test-day experience, explaining how he kept his prep....- Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
09 Oct 2009, 08:33
Kudos
Bookmarks
I'm having a really difficult time with the combined work/rate problems in the quant section. Does anyone have any templates that they use? Tricks? Strategies? Any help/advice is much appreciated.
Cheers!
Cheers!
09 Oct 2009, 09:21
Kudos
Bookmarks
well here is how i go about it,
first of all i basically try to figure out how much percent of the total work can be done by A/B/C (etc) per time unit specified (hrs/days/weeks etc.)
so if we get this info, A can complete painting a wall in 12 days, then % of wall he can paint in one day would be 8.5%
and also if B can complete painting a wall in 20 days, then % of wall B can paint in one day would be 5%.
Now with this info we can do any combination in seconds
.
like A paints for 2 days, then B joins in. How much more time will it take them now?
in 2 days A paints 8.5 x 2 = 17%.
A and B together paint 8.5 + 5 % of the wall per day = 13.5% of the wall per day
So % of wall left is 83%, per day can be painted 13.5% . no of days we need = 83/13.5 which will be close to one of the options you have. (very bad numbers to take for an example
)
you can apply this to any kind of work related probs. I prefer dealing with %ages rather than fractions.
Just ask urself what can be done faster :- (1/15 + 3/5 + 1/20) or (6.66% + 60% + 5%)?
Thats just my approach, i know there are better ones .
first of all i basically try to figure out how much percent of the total work can be done by A/B/C (etc) per time unit specified (hrs/days/weeks etc.)
so if we get this info, A can complete painting a wall in 12 days, then % of wall he can paint in one day would be 8.5%
and also if B can complete painting a wall in 20 days, then % of wall B can paint in one day would be 5%.
Now with this info we can do any combination in seconds
.like A paints for 2 days, then B joins in. How much more time will it take them now?
in 2 days A paints 8.5 x 2 = 17%.
A and B together paint 8.5 + 5 % of the wall per day = 13.5% of the wall per day
So % of wall left is 83%, per day can be painted 13.5% . no of days we need = 83/13.5 which will be close to one of the options you have. (very bad numbers to take for an example
)you can apply this to any kind of work related probs. I prefer dealing with %ages rather than fractions.
Just ask urself what can be done faster :- (1/15 + 3/5 + 1/20) or (6.66% + 60% + 5%)?
Thats just my approach, i know there are better ones .
09 Oct 2009, 09:44
Kudos
Bookmarks
I def agree with you, percents are much better than fractions. I will try a few problems using your approach and get back to you. But I think this is a very good strategy.
What about the rate problems? Like for example, A starts running at 1pm and B starts running 10 minutes later, at what time will they catch up with eachother? Those rate ones also ALWAYS get me, traveling toward/away from eachother with a certain distance in between...any pointers?
What about the rate problems? Like for example, A starts running at 1pm and B starts running 10 minutes later, at what time will they catch up with eachother? Those rate ones also ALWAYS get me, traveling toward/away from eachother with a certain distance in between...any pointers?
