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A hollow sphere of density 3.1g*cm^(-3) ...

A hollow sphere of density `3.1g*cm^(-3)` is floating in a liquid of density `1.5g*cm^(-3)` remaining completely immersed in it. The external diameter of the sphere is 10 cm. Determine its internal diameter.

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The correct Answer is:
8 cm
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CHHAYA PUBLICATION-HYDROSTATICS-PROBLEM SET - II
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