A sphere has a hollow cavity of one third of its total volume. It i...

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A sphere has a hollow cavity of one third of its total volume. It is filled with a liquid of specific
\( \mathrm{P} \) gravity 1.2. The sphere floats in water with four

W fifths of its volume submerged. The specific gravity of the material of the sphere is :-
(1) \( 0.6 \)
(2) \( 0.8 \)
(3) \( 0.4 \)
(4) \( 0.5 \)
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