used this :) https://www.google.com/search?sxsrf=ALeKk03lL3HDnsDXCU4rkhwJr9njnWMh6A%3A1585368558696&ei=7s1XvugKoGyytMPz9SjmAc&q=area+of+a+circle+using+circumference+calculator&oq=area+of+a+circle+using+cir&gs_lcp=CgZwc3ktYWIQARgBMgIIADICCAAyAggAMgIIADIGCAAQFhAeMgYIABAWEB4yBQgAEM0CMgUIABDNAjIFCAAQzQIyBQgAEM0COgQIABBHUPGNAVjTpAFg_LIBaABwAngAgAGbAYgB7gaSAQM3LjOYAQCgAQGqAQdnd3Mtd2l6&sclient=psy-ab
For this case what we can do is the following rule of three: 2/3 of a box ------> 1/2 minutes x of a box ---------> 1 minute Clearing x we have: x = (1 / (1/2)) * (2/3) Rewriting: x = 2 * (2/3) x = 4/3 Answer: the number of boxes per minute that the machine packs is: x = 4/3