Q: If 10 women can complete a task in 7 days and 10 children can complete it in 14 days, how long will it take 5 women and 10 children to complete the task?

A 5
B 7
C 9
D 11

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Answer: B

Explanation:

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

Time and Work

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Q: If 10 women can complete a task in 7 days and 10 children can complete it in 14 days, how long will it take 5 women and 10 children to complete the task?

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