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Hello, Brent@GMATPrepNow, Roland2rule wrote: Operating at the same constant rate, 4 identical machines can produce a total of 220 candles per minute. At this rate, how many candles could 10 such machines produce in 5 minutes? (A) 512 (B) 2,200 (C) 2,750 (D) 11,000 (E) 44,000 Given: 4 machines produc...