

Problem Solving
Running at the constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes? (A) 648 (B) 1,800 (C) 2,700 (D) 10,800 (E) 64,800 In one minute 6 identical machines produce 270 bottles. That means, in one minute one machine produces 270/6 = 45 bottles. That means, in four minute one machine produces 45*4 = 180 bottles. That means, in four minute 10 identical machines produce 180*10 =1800 bottles. So, the answer is (B).

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