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an iron casti...

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an iron casting containing a number of cavities weights 6000N in air ad 4000n in water. what is d volume of the cavities in d casting? density of iron is 7.87 gcm^-3, g=9.8, density of water = 10^3 kgm^-3.

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Q. An iron casting containing a number of cavities weights 6000 N in air and 4000 N in water.What is the volume of the cavities in the casting ? Density of iron is

7.87 g / c m^{3}

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