Question : A, B, and C can complete a piece of work separately in 10, 20, and 40 days, respectively. In how many days will the work be completed if A is assisted by both B and C on every third day?

Option 1: $8\frac{2}{7}$

Option 2: $9$

Option 3: $10 \frac{2}{3}$

Option 4: $6$

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, B, and C can do a piece of work in 30, 20, and 10 days respectively. A is assisted by B on one day and by C on the next day, alternately. How long would the work take to finish?

Option 1: $9 \frac{3}{8}$ days

Option 2: $4 \frac{8}{8}$ days

Option 3: $8 \frac{4}{13}$ days

Option 4: $3 \frac{9}{13}$ days

Question : A, B, and C can do a piece of work in 20, 30, and 60 days, respectively. In how many days can A do the work if he is assisted by both B and C on every third day?

Option 1: 10

Option 2: 15

Option 3: 12

Option 4: 18

Question : A, B, and C can do a piece of work in 30 days, 40 days, and 50 days, respectively. Beginning with A, if A, B, and C do the work alternatively then in how many days will the work be finished?

Option 1: $38 \frac{1}{12}$

Option 2: $36 \frac{1}{2}$

Option 3: $36$

Option 4: $39 \frac{1}{12}$