A valuable painting is in a display case 10 ft. wide, 12 ft. long, and 10 ft. tall, elevated 2 ft. above a solid floor. The case is centered in a 20 ft. long by 20 ft. wide enclosure with 14 ft. high walls on all sides. Use the rate-by-volume method of local application to calculate flow rate and the total amount of carbon dioxide required, assuming a discharge time of 30 seconds.
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