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CDS Model Paper 3 Mathematics
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© examsnet.com
Question : 13
Total: 100
A mother and a daughter working together can complete a certain work in 4 days. But if the mother worked alone she could complete the work in 6 days. Both of them worked for one day and then the mother had to leave. How long will the daughter take to complete remaining work?
7 days
8 days
6 days
9 days
Validate
Solution:
(Mother
+
Daughter)'s one day's work
=
1
4
Remaining work
=
3
4
Mother's one day's work
=
1
6
Daughter's one day's work
=
1
4
−
1
6
=
1
12
1
12
work is done by the daughter in 1 day.
Therefore,
3
4
work will be done by the daughter in
12
×
3
4
=
9
days
© examsnet.com
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