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 2601:30 AM EDT
-02:30 AM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.
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 2512:30 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 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.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
03 Dec 2020, 01:15
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
65% (02:19) correct
35%
(02:22)
wrong
based on 234
sessions
History
Date
Time
Result
Not Attempted Yet
Jay and Anup can do a job, each working alone in 30 and 15 days respectively. Jay started the work and after a few days, Anup joined him. They completed the work in 18 days from the start. After how many days did Anup join A?
A. 6
B. 10
C. 12
D. 14
E. 15
A. 6
B. 10
C. 12
D. 14
E. 15
chinmayektare
Joined: 28 Nov 2018
Last visit: 18 Feb 2024
Posts: 122
Given Kudos: 34
Location: India
Concentration: General Management, Leadership
Schools: Tepper '24 (D)
GPA: 4
03 Dec 2020, 21:55
Kudos
Bookmarks
We know ,
Jay takes 30 days to finish a work and Anup takes 15 days.
Let's take the LCM, which is 30.
Assume there are 30 units of work to be completed.
Hence, rate of doing work for Jay would be 30/30= 1 ( rate= total workdone/total timetaken)
Similarly rate of doing work for Anup would be 30/15 = 2
Let x be the number of days Jay worked for before Anup joined.
therefore , 18-x would be the days they worked together.
We know , work done = rate * time taken
SO, total work done = work done by jay + combined work done by both
i.e 30= 1*x + 3*(18-x)
Solving for x , we get x=12.
Hence Jay works for 12 days before Anup joins in.
Edit : It's my first post , hope it fits the GMAT club standard , please share some kudos if you liked it
Jay takes 30 days to finish a work and Anup takes 15 days.
Let's take the LCM, which is 30.
Assume there are 30 units of work to be completed.
Hence, rate of doing work for Jay would be 30/30= 1 ( rate= total workdone/total timetaken)
Similarly rate of doing work for Anup would be 30/15 = 2
Let x be the number of days Jay worked for before Anup joined.
therefore , 18-x would be the days they worked together.
We know , work done = rate * time taken
SO, total work done = work done by jay + combined work done by both
i.e 30= 1*x + 3*(18-x)
Solving for x , we get x=12.
Hence Jay works for 12 days before Anup joins in.
Edit : It's my first post , hope it fits the GMAT club standard , please share some kudos if you liked it
03 Dec 2020, 22:24
Kudos
Bookmarks
CONCEPT:-Time and Work
-Total work is a sum of the individual works and the collectove work(Jay and Anup here)
SOLUTION: Let the total work be LC(15,30)=30 units.
Efficiency of Jay is 1units/day and that of Anup is 2 units/day.
Together, the efficiency is (1+2)=3 units/day
Let Jay worked for "x" days alone.
Then, 1*(x) X (18-x)*3=30
=>x=12 days (C)
Hope this helps
Devmitra Sen
-Total work is a sum of the individual works and the collectove work(Jay and Anup here)
SOLUTION: Let the total work be LC(15,30)=30 units.
Efficiency of Jay is 1units/day and that of Anup is 2 units/day.
Together, the efficiency is (1+2)=3 units/day
Let Jay worked for "x" days alone.
Then, 1*(x) X (18-x)*3=30
=>x=12 days (C)
Hope this helps
Devmitra Sen
