Arithmetic Aptitude Time and Work

• A 5
• B 7
• C 9
• D 11
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B

Answer: B

The work rate of one woman is 1/70 of the task per day,
and the work rate of one child is 1/140 of the task per day.
The combined work rate of 5 women and 10 children is (5/70 + 10/140) of the task per day,
which is equal to 1/14 of the task per day.
Therefore, it will take 5 women and 10 children a total of 7 days to complete the task

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