Question 165668
Both printers must have finished 50s or less. The first printer takes 15s per page, so may have printed 0, 1, 2, or 3 pages during this time, which leaves 16, 15, 14, or 13 pages to the other printer. This means the other printer could take any one of 50/16, 50/15, 50/14, or 50/13 seconds per page. I don't think there is enough information to figure out which of those times is correct.