Question : A is three times as good a worker as B and therefore, able to finish a piece of work in 60 days less than B. The time (in days) in which they can do it working together is:

Option 1: 22 days

Option 2: $22\frac{1}{2}$ days

Option 3: 23 days

Option 4: $23\frac{1}{4}$ days

Question : A, B, and C together can finish a piece of work in 20 days. A alone can finish the work in 40 days. What part of the work B and C together can finish in a day?

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

Option 2: $\frac{1}{20}$

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

Option 4: $\frac{1}{40}$

Question : A can do in one day three times the work done by B in one day. They together finish $\frac{2}{5}$th of the work in 9 days. The number of days by which B can do the work alone is:

Option 1: 90 days

Option 2: 120 days

Option 3: 100 days

Option 4: 30 days

Question : A can finish a work in 7 days. B can finish the same work in 9 days. The number of days required to finish the same work by both of them together is:

Option 1: $1\frac{15}{16}$

Option 2: $2\frac{15}{16}$

Option 3: $3\frac{15}{16}$

Option 4: $4\frac{15}{16}$

Question : A and B together can complete a piece of work in 15 days and B alone can complete it in 21 days. In how many days can A complete it alone?

Option 1: $41 \frac{1}{2}$ days

Option 2: $52 \frac{1}{2}$ days

Option 3: $31 \frac{1}{2}$ days

Option 4: $57 \frac{1}{2}$ days

Question : Babita is 1.25 times as efficient as Deepak. Working together, they can complete a piece of work in 40 days. In how many days can Deepak alone complete the same piece of work?

Option 1: 84

Option 2: 90

Option 3: 96

Option 4: 100