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Register now and save up to $200 Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code ## A 2 Part question on Time and Work This topic has 2 expert replies and 1 member reply ### GMAT/MBA Expert e-GMAT GMAT Instructor Joined 26 Jul 2010 Posted: 626 messages Followed by: 223 members Upvotes: 527 #### A 2 Part question on Time and Work Tue Jan 01, 2013 9:29 pm Hello Friends, Please try this 2 part question. A, B, & C can do the same job in 8, 24, & 48 hours respectively working individually. It was decided that each of them will work on this job alternatively for an hour. They can start the work in any order. Select 'Minimum hours', & 'Maximum hours' required to complete the job in the table. Make only two selections, one in each column. -Shalabh Attachments This post contains an attachment. You must be logged in to download/view this file. Please login or register as a user. Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums! BTG14 Senior | Next Rank: 100 Posts Joined 06 Apr 2012 Posted: 45 messages Upvotes: 3 Target GMAT Score: 680 GMAT Score: 500 Top Reply Tue Jan 15, 2013 11:19 pm Step 1: in three hours : (1/8 + 1/24+ 1/48)=9/48. Step 2: in (3*5) hours : 9*5/48=45/48. will be completed. Now to be minimum let 45/48+1/8 which is more than 1. So the answer lies between 15 and 16. Now to be maximum 45/48+1/48+1/24=1 which is 17 hours. Answer will be : Minimum:15.5 Maximum 17 hours Thanked by: e-GMAT ### GMAT/MBA Expert Jim@StratusPrep MBA Admissions Consultant Joined 11 Nov 2011 Posted: 2278 messages Followed by: 265 members Upvotes: 660 GMAT Score: 770 Top Reply Fri Jan 04, 2013 2:53 pm The answer is when the sequent equals 1.... _________________ GMAT Answers provides a world class adaptive learning platform. -- Push button course navigation to simplify planning -- Daily assignments to fit your exam timeline -- Organized review that is tailored based on your abiility -- 1,000s of unique GMAT questions -- 100s of handwritten 'digital flip books' for OG questions -- 100% Free Trial and less than$20 per month after.
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BTG14 Senior | Next Rank: 100 Posts
Joined
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Posted:
45 messages
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Target GMAT Score:
680
GMAT Score:
500
Tue Jan 15, 2013 11:19 pm
Step 1: in three hours : (1/8 + 1/24+ 1/48)=9/48.
Step 2: in (3*5) hours : 9*5/48=45/48. will be completed.

Now to be minimum let 45/48+1/8 which is more than 1. So the answer lies between 15 and 16.

Now to be maximum 45/48+1/48+1/24=1 which is 17 hours.

Maximum 17 hours

Thanked by: e-GMAT

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