Two planet of masses in the ratio 1:2, its radii in the ratio 1:2. Then the ratio of acceleration due to gravity will be ..........

Two planet of masses in the ratio 1:2, its radii in the ratio 1:2. The

1.	Two planet of masses in the ratio 1:2, its radii in the ratio 1:2. Then the ratio of acceleration due to gravity will be ..........
Answer» `1:2` `2:1` `3:5` `5:3` Solution :`implies` ACCORDING to `G = (GM)R^2` `g_1/(g_2)=((M_1)/R_1^2)((R_2^2)/M^2)=(m_1/m_2)(R_2/R_1)^2 =(1/2)(2/1)^2` `g_1/(g_(2))=4/2=2` `g_1 : g_2 = 2:1 `