Find in whichever condition/conditions filling of water tank is/are possible :

A. One tap filling the tank in 2 liter / minute.

B. One tap filling the tank in 15 liter / minute and one tap emptying the tank with speed 1 liter / minute.

C. Two tap filling the tank with uniform speed of 4litre/minute and one tap emptying the tank with speed of 500 ml / sec.

D. One tap filling the tank in 2 liter / minute and one tap emptying the tank with speed 4 liter / minute.

Choose the correct answer from the options given below:

A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same work?

A can complete a work in 16 days, working 6 hours a day. B can complete the same work in 12 days, working 9 hours a day. If both A and B work together, working 8 hours a day, in how many days can they complete the work?

A and B together can complete a piece of work in 12 days. A alone can complete the work in 15 days. In how many days can B alone complete the same work?

A completes $\frac{7}{20}$ of a work in 10 days. Then he completes the remaining work with the help of B in 5 days. The time required for A and B together to complete the entire work is:

Vandana can do a piece of work in 25 days. Vasvi is 25% more efficient then Vandana. The number of days taken by Vasvi to do the same piece of work is:

18 women complete a work in 24 days and 24 men complete the same work in 15 days. 16 women worked for 3 days and then they left. 20 men worked for the next 2 days, and then they are joined by 16 women. In how many days will they finish the remaining work?