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What is the flow area in the following diagram? Inner Tube Diameter = 20mm Outer Tube Diameter = 40mm Fin width = 5mm

What is the flow area in the following diagram? Inner Tube Diameter = 20mm Outer Tube Diameter = 40mm Fin width = 5mm Correct Answer 742.5 sq mm

We have Total Area, A = π/4 (402 – 202) – 5×10×4 = 742.5 sq mm.

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