3 × 2 × 2 = 12 feet cubed ( the volume of the carton)
4 × 5 × 6 = 120 feet cubed (the volume of the carton)
if it takes 3 seconds to fill a carton with a volume of 12 then how long will it take to fill a carton with a volume of 120?
12÷3= 4
therefore 4 feet cubed is the amount of space that the carton will be filled with per second.
120 ÷ 4 = 30
therefore it takes 30 seconds to fill a carton that measures 4 feet by 5 feet by 6 feet.