A 10-inch diameter pipe is connected to an 18-inch diameter pipe. If the average velocity in the 10-inch diameter pipe is 25 feet per second (fps), what is the average velocity in the 18-inch diameter pipe?

Question

Quizplus · Accepted Answer

When the average velocity of a 10-inch diameter pipe connected to an 18-inch diameter pipe is 25 fps, the average velocity of the 18-inch diameter pipe is 7.72 fps. Solution: Apply the continuity equation: Area x Velocity = Area x Velocity A₁₈ V₁₈ = A₁₀ V₁₀ V₁₈ =A₁₀ / A₁₈ x V₁₀ = (D₁₀ / D₁₈)² x V₁₀ V₁₈ = (10 /18)² x 25 fps = 7.72 fps

A 10-Inch Diameter Pipe Is Connected to an 18-Inch Diameter