An iron casting weighs 27kg in air 18kg ...

An iron casting weighs 27kg in air 18kg in water. What is the volume of the covities in the casting ? (Density of iron `=7800kgm^(-3)`)

outer volume of casting is `6000 cm^(3)`

outer volume of casting is `9000 cm^(3)`

volume of cavity inside the casting is `780 cm^(3)`

volume of cavity inside the casting is `5538 cm^(3)`

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