Final answer:
To find the number of boxes per minute, we need to convert the paper speed from mm/sec to boxes per minute. Since the width of each box is not given, we cannot determine the exact number of boxes per minute.
Step-by-step explanation:
To find the number of boxes per minute, we need to convert the paper speed from mm/sec to boxes per minute. We know that there are 60 seconds in a minute. So, we can calculate:
Number of boxes per minute = (Paper speed in mm/sec) x (Number of seconds in a minute) / (Width of each box)
Since the paper speed is 25 mm/sec and the width of each box is not given, we cannot determine the exact number of boxes per minute. Therefore, none of the given options (A, B, C, or D) is correct.