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65.Sphere of radius R and made of material of relative density 1.5 has a concentric cavity of radius r. it just floats when placed in a tank full of water. the value of R/r is

Answer» 65.Sphere of radius R and made of material of relative density 1.5 has a concentric cavity of radius r. it just floats when placed in a tank full of water. the value of R/r is


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