R. S. Aggarwal Solutions for Chapter: Time and Work, Exercise 2: EXERCISE 15B

If $4$ men or $6$ boys can do a piece of work in $20$ days, in how many days can $6$ men and $11$ boys complete it, working together?

$3$ men and $4$ women working together for $7$ days, earn $\mathrm{Rs}.3780$ while $11$ men and $13$ women working together for $8$ days, earn $\mathrm{Rs}.15040$. In how many days will $7$ men and $9$ women earn $\mathrm{Rs}.12400$?

If $10$ men and $15$ boys can do a piece of work in $15$ days, then in how many days can $16$ men and $20$ boys do thrice of this work, it being given that $3$ men can do as much work in $2$ hours as $5$ boys can do in 3 hours?

A certain number of men can complete a piece of work in $60$ days. If there were $8$ men more, the work could be finished in $10$ days less. How many men were originally there?

A sum is sufficient to pay $A\text{'}s$ wages for $21$ days or $B\text{'}s$ wages for $28$ days. Find, for how many days, the money is sufficient to pay the wages of both.

$25$ men are employed to do a piece of work which they could finish in $20$ days, but the men drop off by $5$ at the end of every $10$ days. In what time will the work be completed ?

A can do half as much again as B can do in the same time. B alone can do a piece of work in $18$ days. Find, in how many days, both together can finish the work.

A, B and Cworking together can finish a piece of work in $12$ days. A and C together can do twice as much as B does. Also, A and B can do thrice as much as C does. The time taken by $B$ to finish the work is _____ days