Question : Three people A, B, and C worked together and finished a work in 9 days. If A alone can finish the same work in 18 days, and B alone in 30 days, then the number of days C alone will take is:

Option 1: 36 days

Option 2: 45 days

Option 3: 40 days

Option 4: 54 days

Question : A and B can finish a work together in 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days can A alone finish the job?

Option 1: 50 days

Option 2: 60 days

Option 3: 48 days

Option 4: 54 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 and B together can complete a work in 20 days. B and C together can complete the same work in 15 days. If A, B, and C all work together, then the same work gets completed in 10 days. How many days will A and C together take to complete the same work?

Option 1: 8 days

Option 2: 10 days

Option 3: 15 days

Option 4: 12 days

Question : Ali, Avtar Singh, and Ashok working together can finish a work in 8 days. Ali alone can do it in 20 days and Avtar Singh alone can do it in 24 days. In how many days can Ashok alone do the same work?

Option 1: 30

Option 2: 28

Option 3: 26

Option 4: 25