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A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be

A. 2A × √H₁/Cd × a × √(2g)

B. 2A × √H₂/Cd × a × √(2g)

C. 2A × (√H₁ - √H₂)/Cd × a × √(2g)

D. 2A × (√H3/2 - √H3/2)/Cd × a × √(2g)

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