20 men do a work in 20days. How many men are needed to finish the work in 4days?  Choices
A) 50	B) 20	C) 30	D) 100	E) 15
men required to finish the work in 4days = 20*20/4= 
<gadget id="calculator">20*20/4</gadget>
<output>100</output>
100   Answer is 100
<result>D</result>
20 men do a work in 20days. How many men are needed to finish the work in 4days?