Time and Work

A is twice as good a workman as B and together they finish a price of work in $14$ days. In how many days can A alone finish the work?

A customer asks for the production of x number of goods. The company produces y number of goods daily. Out of which z$\%$ are unfit for sale. The order will be completed in.

P can do a piece of work in $9$ days. Q is $50\%$ more efficient than P. The number of days it takes Q to do the same piece of work is __________.

$A$ is $50\%$ as efficient as $B$. $C$ does half of the work done by $A$ and $B$ together. If $C$ alone does the work in $40$ days, then $A, B$ and $C$ together can do the work in

A completes $3/4$ of a work in $18$ days, B $2/3$ of the work in $12$ days and C. $60$% of the same work in $24$ days. A, B and C separately work for $4, 6$ and $8$ days respectively, then how much percent the work is still pending?

$12$ men complete a work in $9$ days. After they have worked for $6$ days, $6$ more men join them. How many days will they take to complete the remaining work ?

A group of workers accepted to do a piece of work in $25$ days. If six of them did not turn up for the work and the remaining workers did the work in $40$ days, then the original number of workers were

A can do$ \dfrac{ 1 }{ 3 }$ of work in 5 days and B can do $\dfrac { 2 }{ 5 }$ of the work in 10 days.In how many days can both A and B together do the work?

$A$ and $B$ can separately do a piece of work in $20$ and $15$ days respectively. They worked together for $6$ days, after which $B$ was replaced by $C.$ If the work was finished in next $4$ days, then the number of days in which $C$ alone could do the work will be :

P can do a job in 10 days, Q can do the same job in 12 days and R can do the same job in 15 days. In how many days they will finish the work together?

3 men can do as much work as 5 women 10 children. If 40 children can finish a work in 7 days, then 6 men, 5 women and 5 children will finish the same work in

If $A$ and $B$ can do a piece of work in $15$ days, $B$ and $C$ can do the same work in $20$ days and $A$ and $C$ can do ti in $30$ days, then $A$ alone can do the work in

$A$ can do a piece of work in $40$ days. He worked at it for $5$ days, then $B$ finished it in $21$ days. The number of days, that $A$ and $B$ take together to finish the work, are