|
|
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.
17 Dec 2019, 11:12
Kudos
Bookmarks
Crew Alpha: 60
Crew Zeta: 30
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
62% (03:34) correct
38%
(03:56)
wrong
based on 110
sessions
History
Date
Time
Result
Not Attempted Yet
Veritas Prep
Work crews Alpha and Zeta are repaving a section of freeway in Los Angeles. Work crew Alpha started its work one week (40 working hours) earlier than work crew Zeta, and started on the north end of the freeway, working its way south at a rate of 12 meters per hour since starting the job. Now, work crew Zeta has started at the south end, working its way north at a rate of 10 meters per hour. The section of freeway that needs to be repaved is 1.5 kilometers long, including the section that has already been paved.
Given that each crew will not necessarily work the same number of hours, which of the following answer choices represents an hourly workload for each crew that will finish the project? Please make only one selection in each column.
Work crews Alpha and Zeta are repaving a section of freeway in Los Angeles. Work crew Alpha started its work one week (40 working hours) earlier than work crew Zeta, and started on the north end of the freeway, working its way south at a rate of 12 meters per hour since starting the job. Now, work crew Zeta has started at the south end, working its way north at a rate of 10 meters per hour. The section of freeway that needs to be repaved is 1.5 kilometers long, including the section that has already been paved.
Given that each crew will not necessarily work the same number of hours, which of the following answer choices represents an hourly workload for each crew that will finish the project? Please make only one selection in each column.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Two-part Analysis (TPA) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
| Crew Alpha | Crew Zeta | Values |
| 10 | ||
| 20 | ||
| 30 | ||
| 40 | ||
| 50 | ||
| 60 |
ShowHide Answer
Official Answer
Crew Alpha: 60
Crew Zeta: 30
17 Dec 2019, 11:55
Kudos
Bookmarks
In 40 hours Alpha crew completed 12*40 = 480m of work
So remaining work is 1500-480= 1020 m
So 12x+10y=1020
So x=60 (Alpha crew work hours)
y=30 (Zeta crew work hours)
Posted from my mobile device
So remaining work is 1500-480= 1020 m
So 12x+10y=1020
So x=60 (Alpha crew work hours)
y=30 (Zeta crew work hours)
Posted from my mobile device
