Question

The relative density of lead is $11.3$. Its density in $SI$ unit is

• A. $1.13\times 10^3$
• B. $1.13\times 10^2$
• C. $1.13\times 10^4$
• D. $11.3$

Answer 1

Answer: (C)

Relative density $=\frac{\text{Density of a substance}}{\text{Density of water}}$
$\therefore$ Density of lead $=11.3\times 1\times 10^{3}kg{m}^{-3}$
($\because$ Density of water $=1\times 10^{3}kg{m}^{-3}$)
$=11.3\times 10^{3}kg{m}^{-3}=1.13\times 10^{4}kg{m}^{-3}$