Subject: General Aptitude · Chapter: Time and Work · Exam: 2006 · Marks: · Difficulty:
A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in
(a)4 days
(b)6 days
(c)8 days
(d)12 days
Answer
Answer (as printed): C
Explanation
(A + B + C)’s 1 day’s work = ; 6 1 (A + B)’s 1 day’s work = ; 8 1 (B + C)’s 1 day’s work =. 12 ∴ (A + C)’s 1 day’s work 1 1 1 1 5 3 1 = 2 × − + = − = = . 6 8 12 3 24 24 8 So, A and C together will do the work in 8 days. 1
Explanation as extracted from the printed page; notation may be imperfect.