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 2301:30 AM EDT
-02:30 AM EDT
Struggling with GMAT Verbal as a non-native speaker? Harsh improved his score from 595 to 695 in just 45 days—and scored a 99 %ile in Verbal (V88)! Learn how smart strategy, clarity, and guided prep helped him gain 100 points.
Apr 2212:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
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.
Updated on: 21 Apr 2024, 09:02
Originally posted by EgmatQuantExpert on 30 May 2018, 03:34.
Last edited by Bunuel on 21 Apr 2024, 09:02, edited 4 times in total.
Last edited by Bunuel on 21 Apr 2024, 09:02, edited 4 times in total.
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
68% (02:51) correct
32%
(03:03)
wrong
based on 966
sessions
History
Date
Time
Result
Not Attempted Yet
Working at their individual same constant rate, 24 machines can complete a certain production job in 10 hours when they all work together. On a certain day, due to minor malfunction, 8 of those machines were not operating for the first 2 hours. Compared to normal days, what is the extra time taken to complete the production job on that day?
A. 20 minutes
B. 30 minutes
C. 40 minutes
D. 1 hour
E. 1 hour 20 minutes
A. 20 minutes
B. 30 minutes
C. 40 minutes
D. 1 hour
E. 1 hour 20 minutes
3 Deadly Mistakes You Must Avoid in Time and Work Questions – Practice question 1
To solve question 2: Question 2
To read the article: 3 Deadly Mistakes You Must Avoid in Time and Work Questions
To solve question 2: Question 2
To read the article: 3 Deadly Mistakes You Must Avoid in Time and Work Questions
30 May 2018, 05:05
Kudos
Bookmarks
EgmatQuantExpert
We are given that 24 machines can complete a production job in 10 hours.
Assume that each machine does 1 unit of work/hour, the work done is 24*10*1 or 240 units.
On the day when the malfunction happens, 16(24-8) machines do 32(16*2*1) units in the first 2 hours.
After 2 hours have been completed, the machines are left with 208 (240-32) units of work to complete.
Thereafter, the time taken to complete the work is \(\frac{208}{24}\)(\(8\frac{2}{3}\)) hours.
The total time taken to do the work is \(10\frac{2}{3}\) hours or 10 hours,40 minutes.
Therefore, the machines take 40 minutes(Option C) extra to complete the work.
General Discussion
30 May 2018, 09:16
Kudos
Bookmarks
pushpitkc
Given : 24 machines can complete a certain production job in 10 hours . Lets assume total unit of work =24*10 units
Also , 8 of those machines were not operating for the first 2 hours. Hence ,at the end of normal time the unit of work remaining = 8*2= 16 units
These 16 units will be compensated by all 24 machines after the end of normal time .
According to our earlier assumption 24 machines can do 24 units in 1 hour.
Thus , 24 machines can do 16 units in = \(\frac{(1*16)}{24} = \frac{16}{24}\) =\(\frac{2}{3}\)hours= 40 mins.
Hence I would go for option C.
