A and B together can complete a task in 15 days. If A alone can complete the task in 25 days, how long will B take to complete the task alone?
Show answer & explanation
Correct answer: B
Explanation
Given:
A and B work together = 15 days
A work alone = 25 days
A + B's work rate = 1/15
A's work rate = 1/25
B's work rate = 1/15 − 1/25 = 2/75
B's time = 1 ÷ (2/75) = 37.5 days