If A completes a work in 18 days and B takes half the time taken by A to complete the same work, what part of the work can they complete in one day if they work together?
A
1/5
B
1/6
C
1/7
D
1/8
Correct Option:
B
Explanation
A's rate is 1/18 of the work per day. B takes half of A's time, so B takes 9 days and works at a rate of 1/9 per day. Together, 1/18 + 1/9 = 3/18 = 1/6 of the work per day.
