Bunuel 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
We can determine the rate of 10 machines with the following proportion:
4/220 = 10/x
4x = 2200
x = 550
We know that 10 machines can produce 550 candles in one minute. Thus, in 5 minutes, 10 machines can produce 550 x 5 = 2750 candles.
Answer: C
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