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:

Since B is 60% more efficient the rate of B is 1.6 x 1/12 = 1.6/12 = 16/120 = 2/15. Since time is inverse of rate, B can complete the job in 15/2 = 7.5 days.