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06 Nov 2019, 06:53
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
63% (02:45) correct
37%
(03:02)
wrong
based on 431
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History
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Not Attempted Yet
Twelve engineers can complete a task in 7 Hours. Twelve engineers started the task at 10 am but starting from 1 pm, one engineer leaves every hour. At what time the task gets completed?
A. 5.30 pm
B. 6.00 pm
C. 6.30 pm
D. 7.00 pm
E. 7.30 pm
Are You Up For the Challenge: 700 Level Questions
A. 5.30 pm
B. 6.00 pm
C. 6.30 pm
D. 7.00 pm
E. 7.30 pm
Are You Up For the Challenge: 700 Level Questions
06 Nov 2019, 07:36
Kudos
Bookmarks
Assume 1 engineer can do 1 unit of work per hour
Total amount of work= 12*7=84 units
Work finished until 1PM= 12*3=36
Remaining work= 84-36=48
Amount of work finished from 1 to 6= 11+10+9+8+7=45
Time taken to finish remaining work=\(\frac{(48-45)}{6}\)= \(\frac{1}{2}\) hour
Task gets completed at 6:30 PM
Total amount of work= 12*7=84 units
Work finished until 1PM= 12*3=36
Remaining work= 84-36=48
Amount of work finished from 1 to 6= 11+10+9+8+7=45
Time taken to finish remaining work=\(\frac{(48-45)}{6}\)= \(\frac{1}{2}\) hour
Task gets completed at 6:30 PM
Bunuel
General Discussion
06 Nov 2019, 09:42
Kudos
Bookmarks
total work= 7*12 ; 84 units
for 10 am to 1 pm total work done ; 12*3 ; 36 units
left 84-36 ; 48 units
this 48 unit of work can be completed from 1 pm onwards by 11+10+9+8+7 ; 45 units and 3 units of work can be done in 3/6 ; 1/2 hour
total time of work shall be completed by 6:30 PM
IMO C
for 10 am to 1 pm total work done ; 12*3 ; 36 units
left 84-36 ; 48 units
this 48 unit of work can be completed from 1 pm onwards by 11+10+9+8+7 ; 45 units and 3 units of work can be done in 3/6 ; 1/2 hour
total time of work shall be completed by 6:30 PM
IMO C
Bunuel
