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A sphere of solid material of specific gravity 8 has a concentric spherical cavity…
PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation
Problem
A sphere of solid material of specific gravity 8 has a concentric spherical cavity and it just sinks in water. The ratio of radius of cavity to that of outer radius of the sphere must be: (A)
7
1
/
3
2
\frac{7^{1/3}}{2}
2
7
1/3
(B)
5
1
/
3
2
\frac{5^{1/3}}{2}
2
5
1/3
(C)
9
1
/
3
2
\frac{9^{1/3}}{2}
2
9
1/3
(D)
3
1
/
3
2
\frac{3^{1/3}}{2}
2
3
1/3
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