Time and Work Questions

If $72$ boys can build a wall of $280\text{m}$ length in $21$ days, how many boys would take $18$ days to build a similar type of wall of length $200\text{m}$?

$2$ men and $1$ woman together can complete a piece of work in $14$ days. $4$ women and $2$ men together can do it in $8$ days. If a man gets $\text{₹}600$ per day, how much should a woman get per day?