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  1. 8 children and 12 men complete a certain piece of work in 9 days. Each child takes twice the time taken by a man to finish the work. In how many days will 12 men finish the same work ?
    1. 9 days
    2. 13 days
    3. 12 days
    4. 15 days
Correct Option: C

Using Rule 1,
2 children ≡ 1 man
∴ 8 children + 12 men ≡ 16 men
∴ M1D1 = M2D2
⇒ 16 × 9 = 12 × D2

⇒ D2 =
16 × 9
= 12 days.
12



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