Question

A can do a work in 12 days , B is 60% more efficient than A . Then only B complete the work in how much time ?​

Answer 1

Answer:

B is 60% more efficient than A, means that the rate of B is 1.6 times as greater as that of A. So, if A can complete the job in 12 days, then B complete the same job in 12/1.6 = 12/(8/5) = 15/2 = 7.5 days.