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12. A vessel, whose bottom has round holes with diameter of 0.1mm, is filled with water. The maximum height to which the water can be filled without leakage is  (S.T. of water =75 dyne/cm, g =1000 cm/s2)

(a)   100 cm                                     

(b)  75 cm

(c)   50 cm

(d)  30 cm

Ans. d

(42)

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