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2015-01-13T02:27:17+05:30

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there is probably a mistake in teh given number for weight in paraffin liquid.  It is 40.3 gf rather than  49.3 gf

Relative density of  iron =  weight in air / (weight in air - weight in water)
             = 44.5 gf / (44.5 - 39.5) gf = 8.9
density of iron = 8.9 * 1000 kg /cubic meter = 8900 kg/ cub meter

relative density of  paraffin
    = (weight of iron piece in air - weight in paraffin) / (weight in air - weight in water)
   = (44.5 - 40.3 ) / ( 44.5 - 39.5)
   = 4.2 / 5 = 0.84

density of paraffin liquid =  840 kg/cubic meter




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