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 : Rahul alone can complete a work in 10 days and Sonu alone can complete the same work in 15 days. If they work together for 4 days, then what part of total work is left?

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

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

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

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

Question : A can do 75% of a job in 9 days and B can do half of the job in 8 days. If they work on it together then in how many days can they do half of the job?

Option 1: $\frac{40}{7}$

Option 2: $\frac{24}{7}$

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

Option 4: $\frac{9}{2}$

Question : P, Q, and R can complete a work alone in 12,15, and 20 days respectively. They started the work together. P left the work 8 days before the work was completed and Q left the work 5 days after P had left. R completed the remaining work alone. How many days will be required to complete the whole work?

Option 1: $\frac{32}{3}$ days

Option 2: $10$ days

Option 3: $\frac{28}{3}$ days

Option 4: $\frac{25}{3}$ days

Question : A can finish a work in 15 days, B can finish the same work in 25 days. They work together for 5 days. The rest of the work is finished by A and C in 4 days. Then C alone can finish the work in:

Option 1: 18 days

Option 2: 24 days

Option 3: 20 days

Option 4: 21 days