IIT JEE Advanced 2006 Paper 1

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Paragraph for Questions 24–26:
A wooden cylinder of diameter 4r, height h and density ρ/3 is kept on a hole of diameter 2r of a tank, filled with water of density ρ as shown in the figure. The height of the base of cylinder from the base of tank is H.
Section: Physics
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Question : 24 of 120
 
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If the level of liquid starts decreasing slowly when the level of liquid is at a height h1 above the cylinder, the block just starts moving up. Then, the value of h1 is
[JEE Adv 2006 P1]
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