Water flows at 1.5 m/s through a pipe of cross-sectional area 8.0 cm² which narrows to 2.0 cm². What is the speed of the water in the narrow section?
Correct answer A. 6.0 m/s
Explanation
By continuity A₁v₁ = A₂v₂, so v₂ = (8.0 × 1.5)/2.0 = 6.0 m/s. Inverting the area ratio gives the incorrect 0.38 m/s.
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