Question : A can do a piece of work in 8 days, while B can do it in 7 days. If they work at it alternately beginning with A, then in how many days will the work be completed?

Option 1: 8

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

Option 3: $7 \frac{1}{2}$

Option 4: 7

Question : Tom can do a piece of work in 7 days, whereas Jay can do the same work in 14 days. How long will it take to finish the work if both work together?

Option 1: $5 \frac{2}{3}$ days

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

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

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

Question : John can do a piece of work alone in 20 days, while Ravi can do the same piece of work alone in 28 days. In how many days can the duo complete the same work if they work together?

Option 1: $11 \frac{1}{3}$

Option 2: $12 \frac{2}{3}$

Option 3: $11 \frac{2}{3}$

Option 4: $12 \frac{1}{3}$

Question : A can do $\frac{7}{8}$ of work in 28 days, and B can do $\frac{5}{6}$ of the same work in 20 days. The number of days they will take to complete if they do it together is:

Option 1: $15\frac{3}{7}$ days

Option 2: $17\frac{3}{5}$ days

Option 3: $14\frac{5}{7}$ days

Option 4: $13\frac{5}{7}$ days

Question : A can do a piece of work in 10 days, while A and B together can complete it in $2 \frac{1}{2}$ days. How long will B alone take to complete the work?

Option 1: $\frac{3}{10}$ days

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

Option 3: $3$ days

Option 4: $4$ days

Question : Sanjay and Rohan can complete a work in 8 days and 12 days, respectively. Starting with Sanjay, they work on alternate days. In how many days will the work be completed?

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

Option 2: $9 \frac{1}{2}$

Option 3: $9 \frac{2}{3}$

Option 4: $9 \frac{1}{3}$