A garden hose of internal radius 1.0 cm delivers water at 2.0 m/s. Approximately how long does it take to fill a 30 L bucket?
Correct answer A. 48 s
Explanation
Flow rate Q = Av = π(0.010)² × 2.0 ≈ 6.28 × 10⁻⁴ m³/s. Time = 0.030/6.28 × 10⁻⁴ ≈ 48 s. Using the diameter instead of radius gives 12 s.
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