Running at the same constant rate, 15 identical machines can produce a total of 45 bags per minute. At this rate, how many bags could 150 such machines produce in 8 minutes?  Answers
A) 9,00	B) 1,800	C) 2,700	D) 3,600	E) 4,800
Let's take the approach that uses the answer choices to eliminate wasted time.   45/15= 
<gadget id="calculator">45/15</gadget>
<output>3</output>
3 bags per minute per machine. 150 machines= 450 per minute. 8 minutes worth = 3600 bags.   Looking at the answers it is clear...we can only choose (D).   THE CORRECT ANSWER IS 3,600.
<result>D</result>
Running at the same constant rate, 15 identical machines can produce a total of 45 bags per minute. At this rate, how many bags could 150 such machines produce in 8 minutes?