Answer: A. (12x3) x 60= 2160 pages per 60 minutes or 1 hour.
(12x3) solve first = 36 pages printed per minute by 3 printers.
36 pages per minute x times 60 minutes =
= 2160 pages, is how many pages 3 printer printing 12 pages a minute can print in 60 minutes or 1 hour.
Explanation: