A can finish a work in 18 days and B can do the same work in half the
time taken by A. Then,working together, what part of the same work they can finish
in a day?
A+B=1/6
A+B=5/6
A+B=1/4
A+B=2/3
Explanation:
Given that B alone can complete the same work in days = half the time
taken by A = 9 days
As one day work = 1/18
Bs one day work = 1/9
(A+B)s one day work = 1/18+1/9 = 1/6
Given that B alone can complete the same work in days = half the time
taken by A = 9 days
As one day work = 1/18
Bs one day work = 1/9
(A+B)s one day work = 1/18+1/9 = 1/6