Running at the same 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?

648
1800
2700
10800

Correct answer: 1800

Solution

6 machines produce 270 bottles per minute, so 1 machine produces 45 bottles per minute. Therefore, 10 machines produce 450 bottles per minute, and in 4 minutes they produce 1800 bottles.

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