Question

If $5$ men or $7$ women can earn Rs. $1575$ in a day, how much would $10$ men and $13$ women earn in $2$ days?

Answer 1

given $5$ men or $7$ women can earn $1575$ in a day

therefore $1$ men can earn $1575/5=315$ and $1$ women can earn $1575/7=225$

now $10$ men and $13$ women can earn $10\times \left(315\right)+13\times \left(225\right)=6075$ per day and now per 2 days =$6075\times 2=12150$

[since each men can earn 315 and each women can earn 225 per 1 day]