Last visit was: 23 Jul 2024, 04:32 It is currently 23 Jul 2024, 04:32
Close
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

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
SORT BY:
Date
Tags:
Difficulty: Sub 505 Level,   Word Problems,               
Show Tags
Hide Tags
Manager
Manager
Joined: 06 Jan 2012
Status:May The Force Be With Me (D-DAY 15 May 2012)
Posts: 164
Own Kudos [?]: 2221 [11]
Given Kudos: 33
Location: India
Concentration: General Management, Entrepreneurship
Send PM
Most Helpful Reply
Math Expert
Joined: 02 Sep 2009
Posts: 94580
Own Kudos [?]: 643200 [6]
Given Kudos: 86728
Send PM
General Discussion
Manager
Manager
Joined: 06 Jan 2012
Status:May The Force Be With Me (D-DAY 15 May 2012)
Posts: 164
Own Kudos [?]: 2221 [0]
Given Kudos: 33
Location: India
Concentration: General Management, Entrepreneurship
Send PM
Math Expert
Joined: 02 Sep 2009
Posts: 94580
Own Kudos [?]: 643200 [0]
Given Kudos: 86728
Send PM
Re: If Ruth began a job and worked continuously until she finished, at [#permalink]
Expert Reply
boomtangboy wrote:
Bunuel wrote:
If Ruth began a job and worked continuously until she finished, at what time of day did she finish the job?

(1) She started the job at 8:15 a.m. and at noon of the same day she had worked exactly half of the time that it took her to do the whole job --> at noon of the same day, so after 3 hours and 45 minutes she started, Ruth had worked HALF OF THE TIME that it took her to do the whole job, which means that the total time it took Ruth to do the whole job is 7.5 hours, so she finished the job at 8:15 a.m+7.5 hours=15:45 p.m. Sufficient.

So as you can see we are not concerned about her rate at all.

(2) She was finished exactly 7.5 hours after she had started. Not sufficient, since we don't know at what time Ruth started the job.

Answer: A.


But what if she increased the rate at which she worked, then the time taken would be less. Thus we would not be able to calculate the time at which she finished

Still confused :?:


We are told that 3 hours and 45 minutes is HALF OF THE TIME that it took her to do the whole job. If 3 hours and 45 minutes is half of the time then the total time it took Ruth to do the whole job is 7.5 hours.
User avatar
Manager
Manager
Joined: 27 Apr 2012
Posts: 55
Own Kudos [?]: 227 [1]
Given Kudos: 21
Location: United States
GMAT Date: 06-11-2013
GPA: 3.5
WE:Marketing (Consumer Products)
Send PM
Re: If Ruth began a job and worked continuously until she finished, at [#permalink]
1
Kudos
Stmt 1 : The time taken from 8:15 a.m. to noon = 3 hrs 45 mins

Since this is half the time she took to complete the job,the total time taken by her to complete the job is = 6 hrs 90 mins i.e. 7 hrs 30 mins

This can help us arrive at the definite time she finished the job, hence this statement is sufficient.


Stmt 2 : While we know the total time she took to complete the job,we do not know the exact time she started working.

Since it is not possible for us to arrive at the exact time of completion,this statement is insufficient.

Answer : A
Intern
Intern
Joined: 28 Aug 2022
Posts: 32
Own Kudos [?]: 3 [0]
Given Kudos: 85
Send PM
Re: If Ruth began a job and worked continuously until she finished, at [#permalink]
not a massive fan of this question bcos it assumes she doesnt take any breaks, assumes a constant Rate of work - does she slow down or increase her rate?

Wish the question said no breaks and constant rate...
Math Expert
Joined: 02 Sep 2009
Posts: 94580
Own Kudos [?]: 643200 [0]
Given Kudos: 86728
Send PM
Re: If Ruth began a job and worked continuously until she finished, at [#permalink]
Expert Reply
yannichc wrote:
not a massive fan of this question bcos it assumes she doesnt take any breaks, assumes a constant Rate of work - does she slow down or increase her rate?

Wish the question said no breaks and constant rate...


If you read the question carefully enough, you'll see that:
1. the question says: "...Ruth began a job and worked continuously until she finished, ... ", so no breaks there.
2. the rate does not matter at all. It's not a work/rate problem.
User avatar
Non-Human User
Joined: 09 Sep 2013
Posts: 34046
Own Kudos [?]: 853 [0]
Given Kudos: 0
Send PM
Re: If Ruth began a job and worked continuously until she finished, at [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
Re: If Ruth began a job and worked continuously until she finished, at [#permalink]
Moderator:
Math Expert
94578 posts