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20 Dec 2021, 07:00
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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:
56% (02:48) correct
44%
(03:01)
wrong
based on 365
sessions
History
Date
Time
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Not Attempted Yet
12 Days of Christmas GMAT Competition with Lots of Fun
40 skilled employees need 60 days to complete a project while working in the normal work schedule of 8 hours a day. They begin working but one month into the project, 30 employees need to shift to a different project. These 30 employees are replaced by 40 new employees who are 50% less productive. How much extra time per day should the new team work to avoid any delay in the completion of the project?
A. 10 hours 40 minutes
B. 10 hours 20 minutes
C. 6 hours 30 minutes
D. 2 hours 40 minutes
E. 2 hours 20 minutes
40 skilled employees need 60 days to complete a project while working in the normal work schedule of 8 hours a day. They begin working but one month into the project, 30 employees need to shift to a different project. These 30 employees are replaced by 40 new employees who are 50% less productive. How much extra time per day should the new team work to avoid any delay in the completion of the project?
A. 10 hours 40 minutes
B. 10 hours 20 minutes
C. 6 hours 30 minutes
D. 2 hours 40 minutes
E. 2 hours 20 minutes
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General Discussion
20 Dec 2021, 07:15
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Let efficiency =1
TOTAL work = 40*60*8= 19200
Work completed in 30 days = 40*30*8=9600
work left = 9600
No of old employees left =10
new employees = 40
No of days left =30
efficiency of new employees =1/2
let no of hours be h
10*h*30+40*1/2*30*h=9600
300h +600h =9600
h=96/9
h in minutes =96*60/9=640 min
=10 hour 40 min
Extra time per day =10 hours 40 min-8 hour=2 hour 40 min
OA
TOTAL work = 40*60*8= 19200
Work completed in 30 days = 40*30*8=9600
work left = 9600
No of old employees left =10
new employees = 40
No of days left =30
efficiency of new employees =1/2
let no of hours be h
10*h*30+40*1/2*30*h=9600
300h +600h =9600
h=96/9
h in minutes =96*60/9=640 min
=10 hour 40 min
Extra time per day =10 hours 40 min-8 hour=2 hour 40 min
OA
