🔍 Key Concepts

• Area = length × width to find the size of the opening in square feet • Volume flow rate = area × velocity when velocity is in feet per minute and area is in square feet • Converting inches to feet before doing calculations

💭 Think About

• What is the area of the 6" by 12" opening once you convert both dimensions into feet? • Once you know the area in square feet, how do you use the air speed (100 ft/min) to find cubic feet per minute? • Do any answer choices clearly not match the order of magnitude you expect after multiplying a small area by 100 ft/min?

✅ Before You Answer

• Convert inches to feet correctly (12 inches = 1 foot) before multiplying • Make sure the area is in square feet, not square inches, before using the velocity in ft/min • Check that your final units are cubic feet per minute (cu ft/min), matching the answer choices