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.
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
08 Jun 2022, 19:30
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
71% (01:29) correct
29%
(01:41)
wrong
based on 189
sessions
History
Date
Time
Result
Not Attempted Yet
Working together, it takes two workers 14 hours to complete a task. How long does it take slower worker to do the same task alone, if one worker is twice as fast as the other?
A. 21 hours
B. 24 hours
C. 36 hours
D. 42 hours
E. 45 hours
A. 21 hours
B. 24 hours
C. 36 hours
D. 42 hours
E. 45 hours
08 Jun 2022, 20:24
Kudos
Bookmarks
Bunuel
Seriously, this is a 500-level question if you can get good at treating fractional rates problems as "Hidden Plug Ins."
We aren't told what the task is, but I hate fractional jobs. Let's just make something up to define the job. We've got something about one worker being twice as fast as the other, so when we add them together, it's like we have 3x the slower one. So, how about we make the job 3x the only other number in the question? Let's make the job solving 42 GMAT questions.
Together, they take 14 hours, so they solve 3 questions per hour. The slower one solves one per hour and the faster one solves 2 per hour. How long would it take the slower one to finish 42 GMAT questions at a rate of 1 question per hour? 42 hours.
Answer choice D.
09 Jun 2022, 04:25
Kudos
Bookmarks
Let the slower worker does 1 unit of work in an hour. Thus, the faster worker will do 2 units in an hour.
Since the total task was completed by both of them in 14 hours,
Total work = (1+2)*14 = 42 units.
The time taken by the slower worker to complete the task = 42/1 hours = 42 hours.
Thus, the correct option is D.
Since the total task was completed by both of them in 14 hours,
Total work = (1+2)*14 = 42 units.
The time taken by the slower worker to complete the task = 42/1 hours = 42 hours.
Thus, the correct option is D.
