A sphere of solid material of relative density 9

Asked by admin @ 20/08/2021 in Math viewed by 382 People

A sphere of solid material of relative density 9 has a concentric spherical cavity and just sinks in water. If the radius of sphere be r, then the radius of cavity (r) will be related to r as

Answered by admin @ 20/08/2021

Step-by-step explanation:

hey friend

here is you answer

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according to the law of floatation

a body floats if weight of the body is equal to the weight of water displayed

weight of the sphere =weight of the water displaced

4/3π(R^3-r^3)*9 pw=4/3πr^3pw

9(R^3-r^3)=R^3

r^3=8/9r^3

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plz mark a s brainliest

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