A group of workers promise to complete a piece of work in 10 days, but five of them do not report for work. If it took the remaining workers 12 days to complete the work, then the number of workers originally hired was
(a)15
(b)25
(c)30
(d)45
Answer
Answer (as printed): C
Explanation
Let the number of workers originally hired be x. Less workers, More days (Indirect Proportion) (x – 5) : x : : 10 : 12 ⇔ 12 (x – 5) = 10 x ⇔ 2x = 60 ⇔ x = 30.
Explanation as extracted from the printed page; notation may be imperfect.