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28 Oct 2020, 21:05
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
79% (02:06) correct
21%
(02:42)
wrong
based on 149
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A team of 10 workers can paint the wall in 8 days. After working 2 days, x additional workers joined the team and together, they finished the job in 4 days. What is the value of x?
A. 5
B. 6
C. 12
D. 4
E. 9
A. 5
B. 6
C. 12
D. 4
E. 9
28 Oct 2020, 21:10
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10 can do in 2 days = 1/4 portion of work..
Remain portion = 3/4.
3/4 can be done in 6 days by 10..
So 3/4 can be done in 4 days by 15..
Additional man =5
Posted from my mobile device
Remain portion = 3/4.
3/4 can be done in 6 days by 10..
So 3/4 can be done in 4 days by 15..
Additional man =5
Posted from my mobile device
28 Oct 2020, 21:43
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Explanation:
Total work = 8*10 = 80units
Work done in 2days by 10 workers = 20units
Work left = 80-20 = 60 units
Additional x workers added to complete left work in 4days.
(10+x)*4 = 60
4x=60-40
4x=20
x=5
IMO-A
Total work = 8*10 = 80units
Work done in 2days by 10 workers = 20units
Work left = 80-20 = 60 units
Additional x workers added to complete left work in 4days.
(10+x)*4 = 60
4x=60-40
4x=20
x=5
IMO-A
