Subject: General Aptitude · Chapter: Time and Work · Exam: 2009 · Marks: · Difficulty:
A job can be done by 3 skilled worksmen in 20 days or by 5 boys in 30 days. How many days will they take if they work together?
(a)8 days
(b)10 days
(c)11 days
(d)12 days
Answer
Answer (as printed): D
Explanation
3 men’s 1 day’s work = ; 20 1 5 boys’ 1 day’s work = . 30 1 1 5 1 (3 men + 5 boys)’s 1 day’s work = + = = . 20 30 60 12 \ 3 men and 5 boys will complete the work in 12 days.
Explanation as extracted from the printed page; notation may be imperfect.