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Relative densities of two substances P a...

Relative densities of two substances P and Q are 3.5 and 0.8 respectively. Find the densities of P and Q. also find whether they will float or sink in water (given that density of water=1000 kg/`m^(3)`)

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Relative density of P=3.5
`therefore ("Density of P")/("Density of water")=3.5" "therefore`Density of `P=3.5xx`density of water=`(3.5xx1000)kg//m^(3)=3500kg//m^(3)`
Similarly, density of `Q=0.8xx`density of water=`(0.8xx1000)kg//m^(3)=800kg//m^(3)`
Since the density of P is greater than that of water, the substance P will sink in water. Again the density of Q is less than that of water, so the substance Q will float in water.
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