A and B can complete a work in 6 days together. If A alone can do it in 12 days, how many days will B alone take?
Show answer & explanation
Correct answer: C
Explanation
Given:
A and B work together = 6 days
A alone works = 12 days
A + B's work rate = 1/6
A's work rate = 1/12
B's work rate = 1/6 − 1/12 = 1/12
B's time = 1 ÷ (1/12) = 12 days
B alone will complete the work in 12 days