A can do a piece ofwork in 14 days and B is 40% more efficient than A. In how many days can B finish it ?

A can do a piece of work in 24 days. If B is 60% more efficient than A, then how many days does B require to do the same work?

A can do a piece of work in 15 days. B is 50% more efficient than A, B can finish it in

A can do a piece of work in 6 days. B is 25% more efficient than A. How long would B alone take to finish this work?

A and B can do a piece of work in 12 days. A is one and a half times more efficient than B. In how many days does A complete the work independently?