The acceleration due to gravity near the surface of a planet of radius $R$ and density $d$ is proportional to
The acceleration due to gravity near the surface of a planet of radius $R$ and density $d$ is proportional to
$\frac{d}{{{R^2}}}$
$d{R^2}$
$dR$
$\frac{d}{R}$
The acceleration due to gravity near the surface of a planet of radius $R$ and density $d$ is proportional to
$g = \frac{4}{3}\pi \rho GR\, \Rightarrow \,g \propto dR$ $(\rho = d\;{\rm{given\, in \,the \,problem)}}$
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