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 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.
03 Feb 2026, 06:35
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
71% (02:50) correct
29%
(02:32)
wrong
based on 41
sessions
History
Date
Time
Result
Not Attempted Yet
Alex and Jordan are two experienced carpenters who often collaborate on major construction projects. This time, they are tasked with building a custom wooden deck for a large home. Individually, Alex takes 12 hours longer, and Jordan takes 27 hours longer to complete the project than they would have taken if they worked as a team. How many hours do Alex and Jordan take to complete the project when working together?
A. 10 hours
B. 14 hours
C. 18 hours
D. 20 hours
E. 28 hours
(Source=TCYOnline)
A. 10 hours
B. 14 hours
C. 18 hours
D. 20 hours
E. 28 hours
(Source=TCYOnline)
03 Feb 2026, 06:35
Kudos
Bookmarks
Right Answer Explanation / Suggested Answer :
Let x be the number of hours Alex and Jordan take to complete the project when working together.
Alex's time alone: x + 12 hours
Jordan's time alone: x + 27 hours
The rate at which Alex works alone is projects per hour, and the rate at which Jordan works alone is projects per hour.
Working together, their combined rate is projects per hour.
The equation for their combined rates is:
x(x + 27) + x(x + 12) = (x + 12)(x + 27)
x2 + 27x + x2 + 12x = x2 + 39x + 324
2x2 + 39x = x2 + 39x + 324
x2 = 324
x = = 18
Alex and Jordan take 18 hours to complete the project when working together.
Let x be the number of hours Alex and Jordan take to complete the project when working together.
Alex's time alone: x + 12 hours
Jordan's time alone: x + 27 hours
The rate at which Alex works alone is projects per hour, and the rate at which Jordan works alone is projects per hour.
Working together, their combined rate is projects per hour.
The equation for their combined rates is:
x(x + 27) + x(x + 12) = (x + 12)(x + 27)
x2 + 27x + x2 + 12x = x2 + 39x + 324
2x2 + 39x = x2 + 39x + 324
x2 = 324
x = = 18
Alex and Jordan take 18 hours to complete the project when working together.
Amity007
