Final answer:
To find the total cubic feet of air in 30 cylinders, each containing 30 ft³, you multiply the volume of one cylinder by the number of cylinders, resulting in a total of 900 ft³.
Step-by-step explanation:
The student asked how many total cubic feet of air are there in 30 cylinders, each containing 30 ft3 of air. To find the total volume of air, you multiply the volume of air in one cylinder by the number of cylinders:
Total volume = Volume of one cylinder × Number of cylinders
Total volume = 30 ft3 × 30
Total volume = 900 ft3
Therefore, there are 900 cubic feet of air in the 30 cylinders in total.