If 12 men or 20 women can do a piece of work in 108 days, then in how many days can 9 men and 12 women together do the work?	Select the correct option:	A) 10 days	B) 30 days	C) 20 days	D) 80 days	E) 40 days
D   80 days   Given that 12m = 20w =&gt; 3m = 5w   9 men + 12 women = 15 women + 12 women = 27 women   20 women can do the work in 108 days. So, 27 women can do it in   (20 * 108) /27= 
<gadget id="calculator">  (20 * 108) /27</gadget>
<output>80</output>
80 days.
<result>D</result>
If 12 men or 20 women can do a piece of work in 108 days, then in how many days can 9 men and 12 women together do the work?