30 men can do a work in 40 days. When should 12 men leave the work so that the entire work is completed in 40 days after they leave the work?  Choose the most appropriate option:
A) 18 days B) 10 days C) 55 days D) 44 days E) 22 days
Total work to be done = 30 * 40= 
<gadget id="calculator">30 * 40</gadget>
<output>1_200</output>
1200   Let 12 men leave the work after 'P' days, so that the remaining work is completed in 40 days after they leave the work.   40P + (12 * 40)= 1200   40P = 720 =&gt; P = 18 days   18 daysnswer:18 days
<result>A</result>
30 men can do a work in 40 days. When should 12 men leave the work so that the entire work is completed in 40 days after they leave the work?