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SSC CGL Model Paper 7
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© examsnet.com
Question : 52
Total: 100
Rajat and Atul can do a piece of work in 9 days and 12 days respectively. If they work for a day alternately, with Rajat beginning, in how many days, the whole work will be completed?
10
1
4
9
1
5
11.11
10
Validate
Solution:
Efficiency of Rajat =
100
9
=
11.11
%
Efficiency of Atul =
100
12
=
8.33
%
→ They do (11.11 + 8.33) % = 19.44% is 2 days
∴ They need 10 days to do 97.20% of work
Now the rest work (100 - 97.22 = 2.78% ) was done by Rajat
=
2.78
11.11
=
1
4
day
∴ Total no. of days required to complete the whole work =
10
+
1
4
=
10
1
4
days
© examsnet.com
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