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1. If 10 men or 18 women can do a work in 45 days, then how many days would it take 25 men and 15 women to do twice the work?
- A. 9
- B. 9
- C. 9
- D. 9
Answer: Option D
Explanation:
Here, 10 men's work = 18 women's work
, ; 1 " " = 18/10 " "
;, 25 " " = 18× 25/10 " "
= 45 women's work
(45 + 15) Women's work = 60 women's work
18 women can do in 45 days
;, 1 woman " " " 18× 45 days
;, 60 women " " " 18× 45/60 "
= 27/2 days
Time needed to done the twice work = 27/2 × 2 = 27 days
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