# A piece of iron weighs 44.5gf in air 39.5gf in water and 40.3gf in an oil find its relative density of iron

2
by mohitjarheda

2015-10-21T12:22:08+05:30

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Relative density of a solid = weight of solid in air/ apparent loss of solid in air and in a liquid.
therfore the realtive density is 8.9.
2015-10-22T01:40:08+05:30

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Wa = weight of iron piece in air
Ww = weight of iron piece in water

normally relative density is calculated wrt  water.

relative density of iron piece =  Wa / (Wa - Ww)
= weight in air / Loss of weight in water
= 44.5 / (44.5 - 39.5) = 8.9
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if weight in oil is also known then you could calculate relative density of oil also.

relative density of oil = (Wa - Woil) / (Wa - Ww)