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SSC CGL Tier 2 Exam 25 Oct 2015 Paper 1
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© examsnet.com
Question : 24
Total: 100
A and B can do a given piece of work in 8 days, B and C can do the same work in 12 days and A, B, C complete it in 6 days. Number of days required to finish the work by A and C is
16
8
12
24
Validate
Solution:
(2) (A + B)’s 1 day’s work
=
1
8
(B + C)’s 1 day’s work =
1
12
(A + B + C)’s 1 day’s work =
1
6
∴ C’s 1 day’s work =
1
6
−
1
8
=
4
−
3
24
=
1
24
A’s 1 day’s work
=
1
6
−
1
12
=
2
−
1
12
=
1
12
∴ (A + C)’s 1 day’s work
=
1
12
+
1
24
=
2
+
1
24
=
1
8
∴ Required time = 8 days
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