general math MCQ #1085

If A and B together can complete a job in 15 days and B alone can complete it in 20 days, in how many days can A alone complete the job:

general math MCQ #1085

Question 1
Q1. If A and B together can complete a job in 15 days and B alone can complete it in 20 days, in how many days can A alone complete the job:
- A) 60
- B) 45
- C) 40
- D) 30
Answer: 60
Explanation: A's rate = 1/15 − 1/20 = 1/60; A alone completes the job in 60 days.