Question : A can finish a work in 20 days and B can complete the same work in 15 days. B worked for 9 days and left the job. In how many days can A alone finish the remaining work?

Option 1:  10 days

Option 2: 8 days

Option 3: 9 days

Option 4: 7 days

Question : Sara can finish a work in 18 days and Tara can complete the same work in 15 days. Tara worked for 10 days and left the job. In how many days can Sara finish the remaining work alone?

Option 1: 6

Option 2: 7

Option 3: 8

Option 4: 5

Question : A and B together can finish a work in 30 days. They worked on it for 20 days and then B left. The remaining work was done by A alone in 20 days. In how many days can A alone finish the work?

Option 1: 48 days

Option 2: 50 days

Option 3: 54 days

Option 4: 60 days

Question : A is 50% more efficient than B. B finished the same work in 20 days. If A and B worked together, then how much time would they take to finish the same work?

Option 1: 10 days

Option 2: 7 days

Option 3: 8 days

Option 4: 9 days

Question : A can do a piece of work in 20 days and B in 30 days. They work together for 7 days and then both leave the job. Then C alone finishes the remaining work in 10 days. In how many days will C finish the full work?

Option 1: 25 days

Option 2: 30 days

Option 3: 24 days

Option 4: 20 days

Question : A can do 20% of a task in 4 days and B can do $33\frac{1}{3}$% of the same task in 10 days. They worked together for 9 days and then, C completed the remaining work in 6 days. B and C together will complete 75% of the same work in:

Option 1: 12 days

Option 2: 9 days

Option 3: 11 days

Option 4: 10 days