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UPSC CDS I 2019 Math Paper
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© examsnet.com
Question : 36
Total: 100
A field can be reaped by 12 men or 18 women in 14 days. In how many days can 8 men and 16 women reap it ?
[2019 CDS-I]
26 days
24 days
9 days
8 days
Validate
Solution:
Let m and w be the efficiency of a man and a woman
12m = 18w
Let 8 men and 16 women finish the work in d days
8
m
+
16
w
=
12
w
+
16
w
=
28
w
According to the question:
18
w
×
14
=
28
w
×
d
⇒
d
=
9
© examsnet.com
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