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 24 days. If B is 60% more efficient than A, then the number of days required by B to do the same piece of work is :

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?