Question

a can do a certain job in 12days. b is 60% more efficient than a. the number of days it takes b to do the same piece of work?

Answer 1

7.5 will be the answer

Answer 2

A's 1 days' work = 1/12

∴ B's 1 days' work = 1.6/12= 16/120 = 2/15

∴ B shall complete the work in 15/2 days =

$7 \frac{1}{2} \: days$