ABC26GN3524 · Time and Work
Subject: General Aptitude · Chapter: Time and Work · Exam: 2010 · Marks: · Difficulty:
If 3 men or 9 boys can finish a piece of work in 21 days, in how many days can 5 men and 6 boys together do the same piece of work?
(a)8 days
(b)12 days
(c)14 days
(d)Cannot be determined
(e)None of these
Answer
Explanation
1 man’s 1 day’s work = = ; 21 × 3 63 1 1 1 boy’s 1 day’s work = = . 21 × 9 189 (5 men + 6 boys)’s 1 day’s work 5 6 5 2 7 1 = + = + = = . 63 189 63 63 63 9 Hence, 5 men and 6 boys together can do the work in 9 days. 1 1
Explanation as extracted from the printed page; notation may be imperfect.
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