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Q.

10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?

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a

7

b

3

c

None

d

5

answer is C.

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Detailed Solution

1 women 1 day’s work $= \frac{1}{70}$

1 child 1 day’s work $= \frac{1}{140}$

(5 women $+$ 10 children) is 1 day work $= [\frac{5}{70} + \frac{10}{140}] = \frac{1}{7}$

$∴$ 5 women and 10 children complete the work in 7 days.

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