Two men can complete a piece of work in four days. Two women can complete the same work in eight days. Four boys can complete the same work in five days. If four men, eight women and 20 boys work together in how many days can the work be completed?
Choose the most appropriate option:
A) 1/2 day  B) 2 1/2 days  C) 1 1/2 days  D) 3 1/2 days  E) 2 days
A   1/2 day   Two men take four days to complete the work four men would take   (2 * 4)/4= 
<gadget id="calculator">  (2 * 4)/4</gadget>
<output>2</output>
2 days to complete it.   Similarly four women would take two days to complete it and 20 children would take one day to complete it.   All the three groups working togerther will complete   1/2 + 1/2 + 1/1= 
<gadget id="calculator">  1/2 + 1/2 + 1/1</gadget>
<output>2</output>
2 times the unit work in a day.   They will take 1/2 a day to complete it working together.
<result>A</result>
Two men can complete a piece of work in four days. Two women can complete the same work in eight days. Four boys can complete the same work in five days. If four men, eight women and 20 boys work together in how many days can the work be completed?