10 men do a work in 10days. How many men are needed to finish the work in 5days?	Answers:
A) 50
B) 20
C) 30
D) 10
E) 15
men required to finish the work in 5days = 10*10/5= 
<gadget id="calculator">10*10/5</gadget>
<output>20</output>
20   Answer is 20
<result>B</result>
10 men do a work in 10days. How many men are needed to finish the work in 5days?