Subject: General Aptitude · Chapter: Time and Work · Exam: · Marks: · Difficulty:
A and B together can complete a work in 12 days. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work ?
(a)110 days
(b)11 days
(c)15 days
(d)20 days
Answer
Answer (as printed): C
Explanation
B’s 1 day’s work = − = = . 12 20 60 30 1 1 4 1 Now, (A + B)’s 1 day’s work = + = = . 20 60 60 15 [Q B works for half day only] So, A and B together will complete the work in 15 days.
Explanation as extracted from the printed page; notation may be imperfect.