If 5 machines can produce 20 units in 10 hours, how long would it take 25 to produce 100 units? Choose one.
A) 5  B) 9  C) 6  D) 10  E) 2
5 machines would produce 100 units in 50 hours. Increasing the amount of machines by 5 would mean dividing 50 hours by 5.   50/5= 
<gadget id="calculator">50/5</gadget>
<output>10</output>
10   Answer : 10
<result>D</result>
If 5 machines can produce 20 units in 10 hours, how long would it take 25 to produce 100 units?