In each of the following questions, read the given statements and compare the two given quantities and give answer.
Quantity I – 10 men can complete a piece of work in 8 days. 20 women can complete the same piece of work in 6 days. In how many days 16 men and 18 women together can complete the same piece of work?
Quantity II – 6 women and 6 men together can complete a piece of work in 6 days. In how many days can 15 men alone complete the piece of work if 9 women alone can complete the work in 10 days?