R and r are the radii of the earth and m...

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

`R/r rho_(e)/rho_(m)`

`r/R rho_(e)/rho_(m)`

`r/R rho_(m)/rho_(e)`

`R/r rho_(e)/rho_(m)`

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