20 L/s is equal to how many cubic feet per minute (cfm)?

20 L/s is equal to how many cubic feet per minute (cfm)?

• A. 40 cfm
• B. 60 cfm
• C. 20 cfm
• D. 80 cfm

Answer: (A)

Converting flow rate between liters per second and cubic feet per minute uses simple unit conversions and a minute-to-second adjustment. First, turn the rate into per minute: 20 L/s × 60 s/min = 1200 L/min. Next, convert liters to cubic meters (1 L = 0.001 m³): 1200 L/min = 1.2 m³/min. Then convert cubic meters to cubic feet (1 m³ = 35.3147 ft³): 1.2 m³/min × 35.3147 ≈ 42.38 ft³/min. So the exact result is about 42.4 cfm. Since the choices are rounded, the closest match is 40 cfm. The other options are noticeably off (60, 20, or 80 cfm).

Converting flow rate between liters per second and cubic feet per minute uses simple unit conversions and a minute-to-second adjustment. First, turn the rate into per minute: 20 L/s × 60 s/min = 1200 L/min. Next, convert liters to cubic meters (1 L = 0.001 m³): 1200 L/min = 1.2 m³/min. Then convert cubic meters to cubic feet (1 m³ = 35.3147 ft³): 1.2 m³/min × 35.3147 ≈ 42.38 ft³/min. So the exact result is about 42.4 cfm. Since the choices are rounded, the closest match is 40 cfm. The other options are noticeably off (60, 20, or 80 cfm).