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

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 finish a work in 25 days, and B can do the same work in 15 days. B worked for 10 days and left the job. A alone can finish the remaining work in how many days?

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

Option 2: $6 \frac{1}{3}$ days

Option 3: $8 \frac{1}{3}$ days

Option 4: $5 \frac{1}{3}$ days

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 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