20 men do a work in 20days. How many men are needed to finish the work in 10days? Pick one:
A) 50  B) 20  C) 30  D) 10  E) 40
men required to finish the work in 10days = 20*20/10= 
<gadget id="calculator">20*20/10</gadget>
<output>40</output>
40   Answer is 40
<result>E</result>
20 men do a work in 20days. How many men are needed to finish the work in 10days?