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[" 10.A metallic sphere with an internal...

[" 10.A metallic sphere with an internal cavity weight "],[40g" in air and "20g" in water.If the density of "],[" the material of sphere is "8g/cm^(3)" then the "],[" volume of cavity is "],[[" (1) Zero "," (2) "15cm^(3)],[" (3) "5cm^(3)," (4) "20cm^(3)]]

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