14 men can complete a work in 18 days, and 21 women can complete the same work in 20 days. If a child is 20% less efficient than a man, how many days ...
Question
14 men can complete a work in 18 days, and 21 women can complete the same work in 20 days. If a child is 20% less efficient than a man, how many days will 15 children working together take to finish the work?