NIFT PG 2008 Question Paper with solutions

1 day’s work of 25 men and 15 women $=\frac{1}{2}$
8 day’s work of 25 men and 15 women$=8\times \frac{1}{2}=\frac{2}{3}$
Remaining part of work $=1-\frac{2}{3}=\frac{1}{3}$
Now, $\frac{1}{3}$ work has been completed by 25 menin 6 days.
Since, 1 work has been completed by 25 men in 18 days.
Then, 1 day’s work of 15 women $=\frac{1}{12}-\frac{1}{18}$
$=\frac{1}{36}$
Hence, in 36 days 15 women will be completed the job.