2022 · Q108
Suppose A and B can complete a work together in 10 days. If B alone can complete the work in 15 days, then in how many days can A alone finish the work?
general-mental-abilityquantitative-aptitude
- A20 days
- B24 days
- C25 days
- D30 days
Explanation
A's one-day work plus B's one-day work equals 1/10 of the work, and B alone does 1/15 per day. So A's one-day work = 1/10 − 1/15 = 1/30. Hence A alone finishes the whole work in 30 days.