Two planets A and B of radii $R$ and $1.5 R$ have densities $\rho$ and $\frac { \rho } { 2 }$ respectively. The ratio of acceleration due to gravity at the surface of $B$ to $A$ is: (1) $2 : 3$ (2) $2 : 1$ (3) $3 : 4$ (4) $4 : 3$
Two planets A and B of radii $R$ and $1.5 R$ have densities $\rho$ and $\frac { \rho } { 2 }$ respectively. The ratio of acceleration due to gravity at the surface of $B$ to $A$ is:\\
(1) $2 : 3$\\
(2) $2 : 1$\\
(3) $3 : 4$\\
(4) $4 : 3$