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.
Jun 0308:30 AM PDT
-09:30 AM PDT
In Episode 7 of our GMAT Ninja CR series, we are rounding up the oddballs, the misfits, and the format-benders: EXCEPT, Fill-In-The-Blanks, and other unusual Critical Reasoning question types. When you see a question that ends with a literal blank line
May 2910:00 AM IST
-11:00 PM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.- Jun 04
08:30 AM PDT
-09:30 AM PDT
For most test takers, Data Insights is the most challenging section on the GMAT, with test takers scoring several points lower on average on DI than on Quant or Verbal and completing the section with less time to spare. - 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..
10 Apr 2010, 06:20
Kudos
Bookmarks
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
0% (00:00) correct
100%
(00:26)
wrong
based on 1
sessions
History
Date
Time
Result
Not Attempted Yet
three workers can malk the kow in 4, 5 or 6 minutes. How many cows can be malked by all the 3 workers together in 2 mins?
This question is pretty simple. But i want to clarify one doubt.
Combined rate is: 1/4 + 1/5 + 1/6 = 37/60
Now is the rate 37/60 or 60/37?
I have seen in some questions that after taking reciprocal we sum up and then take reciprocal again .. like
rate of 2 + rate of 3 together == 1/2 + 1/3 --> 5/6 --> 6/5
Also the same is done in work formula = xy/x+y ==> 2*3/2+3 --> 6/5
Am i missing some important concept?
This question is pretty simple. But i want to clarify one doubt.
Combined rate is: 1/4 + 1/5 + 1/6 = 37/60
Now is the rate 37/60 or 60/37?
I have seen in some questions that after taking reciprocal we sum up and then take reciprocal again .. like
rate of 2 + rate of 3 together == 1/2 + 1/3 --> 5/6 --> 6/5
Also the same is done in work formula = xy/x+y ==> 2*3/2+3 --> 6/5
Am i missing some important concept?
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
10 Apr 2010, 10:03
Kudos
Bookmarks
rate = amount of work/ time taken
If you need the amount of work that can be done by all 3 together in 1 minute then it's 37/60
But if you need the time taken by all 3 together to complete 1 unit of work then you take the reciprocal which is 60/37
If you need the amount of work that can be done by all 3 together in 1 minute then it's 37/60
But if you need the time taken by all 3 together to complete 1 unit of work then you take the reciprocal which is 60/37
10 Apr 2010, 12:01
Kudos
Bookmarks
When in doubt on Work questions, just default back to the standard equation
A = r * t
In this case we use the rate of all three workers together (37/60 cows/minute), and the time is 2 minutes. So we multiply 37/60 * 2 to get the amount.
Make sure you keep track of the units:
37/60 cows/minute * 2 minutes = 74/60 cows
Notice that on the left hand side, the unit of "minutes" will cancel to leave you with Cows.
A = r * t
In this case we use the rate of all three workers together (37/60 cows/minute), and the time is 2 minutes. So we multiply 37/60 * 2 to get the amount.
Make sure you keep track of the units:
37/60 cows/minute * 2 minutes = 74/60 cows
Notice that on the left hand side, the unit of "minutes" will cancel to leave you with Cows.
