Running at the same constant rate, 100 identical machines can produce a total of 500 coffee bar per minute. At this rate, how many bottles could 20 such machines produce in 2 minutes? Answers
A) 110	B) 220	C) 330	D) 200	E) 789
Let's take the approach that uses the answer choices to eliminate wasted time.   500/100= 
<gadget id="calculator">500/100</gadget>
<output>5</output>
5 coffee bar per minute per machine. 20 machines= 100 per minute. 2 minutes worth = 200 coffe bar.   Looking at the answers it is clear...we can only choose (200)   THE CORRECT ANSWER IS 200.
<result>D</result>
Running at the same constant rate, 100 identical machines can produce a total of 500 coffee bar per minute. At this rate, how many bottles could 20 such machines produce in 2 minutes?