Question : A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days will A, B, and C finish it, working all together?

Option 1: $6$ days

Option 2: $5\frac{1}{4}$ days

Option 3: $4\frac{4}{11}$ days

Option 4: $4$ days

Question : A can do a piece of work in 6 days, working 8 hours a day, while B can do the same work in 4 days, working 10 hours a day. If the work has to be completed in 5 days, how many hours do they need to work together in a day?

Option 1: $4$

Option 2: $5\frac{4}{11}$

Option 3: $6\frac{4}{11}$

Option 4: $4\frac{4}{11}$

Question : A and B can finish a work in 10 days, B and C can finish it in 12 days and C and A can finish in 6 days. In how many days A alone can finish the work?

Option 1: $\frac{120}{9}$

Option 2: $12$

Option 3: $\frac{120}{11}$

Option 4: $\frac{121}{12}$

Question : A can do as much work in 4 days as B can do in 5 days and B can do as much work in 6 days as C in 7 days. In what time will C complete a piece of work that A can do in a week?

Option 1: $10\frac{5}{24}$ days

Option 2: $4\frac{4}{5}$ days

Option 3: $6\frac{8}{15}$ days

Option 4: $12\frac{6}{19}$ days

Question : A can do a piece of work in 20 days and B in 15 days. With the help of C, they finish the work in 5 days. C can alone do the work in:

Option 1: 5 days

Option 2: 6 days

Option 3: 10 days

Option 4: 12 days

Question : A, B, and C can do a job in 6 days, 12 days and 15 days respectively. After $\frac{1}{8}$th of the work is completed, C leaves the job. The rest of the work is done by A and B together. The time taken to finish the work is:

Option 1: $5\frac{5}{6}$ days

Option 2: $5\frac{1}{4}$ days

Option 3: $3\frac{1}{2}$ days

Option 4: $3\frac{3}{4}$ days