8 men or 12 women can do a work in 10 days. In how many days can 4 men and 4 women do the same work?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 12
Since 8 men do the same work as 12 women in the same time, one man does the work of \(\frac{12}{8}=1.5\) women. Turning the men into women puts everyone in one unit.
4 men \(=4\times1.5=6\) women, so 4 men and 4 women \(=10\) women
Whole work \(=12\) women \(\times\) 10 days \(=120\) woman-days
Days for 10 women \(=120\div10=12\)