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Question
If 5 men and 9 women can do a piece of work in 19 days, then in how many days will 3 men and 6 women do the same work?
12
15
18
21
ANSWER : 2
Descrption
<p>Hints: short method</p> <p>Time = Men<sub>1</sub> × women<sub>1</sub> × Time<sub>1 </sub>/ Men<sub>1</sub> × women<sub>2</sub> + Men<sub>2</sub> × women<sub>1</sub> </p> <p> = 5 × 9 × 19/ 5 × 6 + 9 × 3 = 15</p>
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