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22 Jun 2021, 04:00
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E
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:
70% (02:30) correct
30%
(02:46)
wrong
based on 291
sessions
History
Date
Time
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Not Attempted Yet
A group of 20 software engineers can finish a development project in 30 days. They got a project with the deadline of 35 days. After how many days should 5 engineers be released so that the project completes on time?
(A) 5
(B) 8
(C) 10
(D) 12
(E) 15
(A) 5
(B) 8
(C) 10
(D) 12
(E) 15
22 Jun 2021, 04:21
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Say for x days 20 engineers work and for 35-x days 15 engineers work
\(\frac{x*20}{30*20 } + \frac{(35-x)*15}{30*20} = 1\)
Solve for x
X= 15
(E) is the answer IMO
\(\frac{x*20}{30*20 } + \frac{(35-x)*15}{30*20} = 1\)
Solve for x
X= 15
(E) is the answer IMO
Bunuel
General Discussion
22 Jun 2021, 04:35
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Explanation:
Total Work = 20 x 30 = 600 man-days
Let, 5 engineer leave in starting,
so rest work done by 15 engineers in 35 days = 35x15 = 525mandays
Remaining work = 600 -525 =75 man-days.
Work done by 5 engineer =75/5 = 15 days
So after 15days, engineer will left the work
IMO-E
Total Work = 20 x 30 = 600 man-days
Let, 5 engineer leave in starting,
so rest work done by 15 engineers in 35 days = 35x15 = 525mandays
Remaining work = 600 -525 =75 man-days.
Work done by 5 engineer =75/5 = 15 days
So after 15days, engineer will left the work
IMO-E
