Running at the same constant rate, 6 identical machines can produce a total of 360 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes? Choose the correct answer:
A) 648 B) 1800 C) 2400 D) 10800 E) 10900
Let the required number of bottles be x.   More machines, More bottles (Direct Proportion)   More minutes, More bottles (Direct Proportion)   Machines	6	:	10	:: 360 : x   Time (in minutes)	1	:	4   6 x 1 x x = 10 x 4 x 360   x =	(10 x 4 x 360)/(6)   x = 2400.   ANSWER:2400
<result>C</result>
Running at the same constant rate, 6 identical machines can produce a total of 360 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?