$6$ typists typing $8$ hours a day take $20$ days to complete a manuscript. If the work is to be completed in $12$ days, then how many more typists should be employed if each typist works for $5$ hours a day?

If $2$ men and $8$ women can finish a piece of work in$15$ days whereas $8$ men and $16$ women can finish the same work in $6$ days, then according to the amount of work done, $3$ men are equivalent to $k$ women. The value of $k$ is 

If $2$ men and $8$ women can finish a piece of work in$15$ days whereas $8$ men and $16$ women can finish the same work in $6$ days. If the time taken by $9$ men and $4$ women to complete the same work is $k$ days, then $k$ is

$3$ men and $4$ women can finish a work in $12$ days whereas $5$ men and $4$ women can complete the same work in $9$ days. Find the ratio of the amount of work done by a man to the amount of work done by a woman.

If $5$ workers can earn $₹17500$ in $10$ days, then how many workers will earn $₹29400$ rupees in $7$ days?

If $5$ men or $6$ women can earn $₹5400$ per day, then how much will $8$ men and $9$ women earn per day? (Express your answer in $₹$)

$9$ mangoes cost $₹90$. If $k$ mangoes can be bought for $₹1160$, then find the value of $k$.

A group of labourers is hired to complete the work in $12$ days, but three of them do not come work. Find the original number of labourers in the group, if the remaining labourers completed the work in $15$ days.

$A$ can do a piece of work in $10$ days and $B$ in $15$ days. If both of them work together, then they will take $k$ days to finish the work​. The value of $k$ is