If 10 machines can produce 20 units in 10 hours, how long would it take 40 machines to produce 100 units?	Choose the correct choice from the following:
A) 9.5 B) 6.4 C) 2.3 D) 8.9 E) 12.5
10 machines would produce 100 units in 50 hours. Increasing the amount of machines by 4 would mean dividing 50 hours by 4.   50/4= 
<gadget id="calculator">50/4</gadget>
<output>25/2 = around 12.5</output>
12.5   Answer : 12.5
<result>E</result>
If 10 machines can produce 20 units in 10 hours, how long would it take 40 machines to produce 100 units?