Question : Working 5 hours a day, A can complete a task in 8 days, and working 6 hours a day, B can finish the same task in 10 days. Working 8 hours daily, they can jointly complete the task in _____.

Option 1: 5 days

Option 2: 3 days

Option 3: 4.5 days

Option 4: 6 days

Question : 10 women can do a work in 6 days and 6 men can do the same work in 5 days. If all these men and women work together, then how many days will they take to finish this work?

Option 1: $2\frac{8}{11}$

Option 2: $4\frac{6}{11}$

Option 3: $1\frac{2}{11}$

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

Question : A can do a piece of work in 9 days, while B can do it in 12 days. A and B together can do the work in:

Option 1: $5\frac{1}{7}$ days

Option 2: $5\frac{2}{7}$ days

Option 3: $6\frac{1}{7}$ days

Option 4: $6\frac{2}{7}$ days

Question : Two workers A and B are engaged to do a piece of work. Working alone A would take 8 hours more to complete the work than when working together. If B worked alone, would take $4\frac{1}{2}$ hours more than when working together. The time required to finish the work together is:

Option 1: 5 hours

Option 2: 4 hours

Option 3: 8 hours

Option 4: 6 hours

Question : If 90 men can do a certain job in 16 days, working 12 hours per day, then the part of that work which can be completed by 70 men in 24 days, working 8 hours per day is:

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

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

Option 3: $\frac{7}{9}$

Option 4: $\frac{5}{8}$