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RRB NTPC 18 January 2017 Paper
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© examsnet.com
Question : 39
Total: 120
10 men and 5 women can do a work in 60 days. If one man can do the work of two women, how long will 5 men and 20 women take to complete half of the work?
25
30
36
50
Validate
Solution:
(1)Let a man and a woman can do work in x and 2x days respectively.According to the question,
10
x
+
5
2
x
=
1
60
⇒
25
2
x
=
1
60
⇒
x
=
30
×
25
=
750
days
⇒
2
x
−
1500
days
Now, 5 men and 20 women will do the work in
5
M
+
20
w
=
5
750
+
20
1500
=
30
1500
=
1
50
So, they will do the whole work in50 days and half of the work in 25days.
© examsnet.com
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