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Q.
The relative density of lead is $11.3 .$ Its density is $g\, cm ^{-3}$ or $\quad \,kg\, m ^{-3}$
Physical World, Units and Measurements
Solution:
Relative density of lead
$=\frac{\text { density of lead }}{\text { density of water }} \Rightarrow 11.3=\frac{\text { density of lead }}{1 g cm ^{-3} \text {or } 1000 kg m ^{-3}}$
$\Rightarrow $ density of lead $=11.3\, g \,cm ^{-3}$ or $11300 \,kg\, m ^{-3}$