The radii of two planets are respectively `R_(1) and R_(2)` and their densities are respectively `rho_(1) and rho_(2)`.The ratio of the accelerations due to gravity at their surface is

The radii of two planets are respectively R_(1)andR_(2) and their densities are respectively rho_(1)andrho_(2) . The ratio of the accelerations due to gravity (g_(1)//g_(2)) at their surfaces is:

R and r are the radii of the earth and moon respectively. rho_(e) and rho_(m) are the densities of earth and moon respectively. The ratio of the accelerations due to gravity on the surfaces of earth and moon is