Question : A and B can complete a piece of work in 13 and 17 days respectively. A begins to do the work, and they work alternatively one at a time for one day each. The whole work will be completed in:

Option 1: $17 \frac{11}{17}$ days

Option 2: $17 \frac{17}{19}$ days

Option 3: $14 \frac{11}{17}$ days

Option 4: $11 \frac{11}{17}$ days

Question : A can do $\frac{1}{3}$ of a work in 30 days. B can do $\frac{2}{5}$ of the same work in 24 days. They worked together for 20 days. C completed the remaining work in 8 days. Working together A, B and C will complete the same work in:

Option 1: 15 days

Option 2: 10 days

Option 3: 18 days

Option 4: 12 days

Question : P, Q, and R can complete a piece of work in 10 days, 15 days, and 20 days, respectively. If they work together, in how many days can they finish the same work?

Option 1: $4 \frac{8}{13}$

Option 2: $4 \frac{3}{7}$

Option 3: $4 \frac{7}{13}$

Option 4: $4 \frac{5}{7}$

Question : A and B can complete a work in 10 and 16 days respectively. A begins to do the work and they work alternatively one at a time for one day each. The whole work will be completed in:

Option 1: $12 \frac{1}{4}$ days

Option 2: $13 \frac{1}{4}$ days

Option 3: $15 \frac{1}{4}$ days

Option 4: $14 \frac{1}{4}$ 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: $4\frac{4}{11}$