if density of a planet is double that of the earth the radius 1 5 times that of the earth, - Physics - Gravitation

Question

if density of a planet is double that of the earth the radius 1 5
times that of the earth, the acceleration due to gravity on the
surface of the planet is???
a)3/4 times of earth
b) 3 times of earth

Neha Gupta · Accepted Answer

Density of planet = 2×density of earthDp= 2 ×Deradius of the planet = 1
5 radius of the earthRp = 1
5×ReSinceDp= 2 ×DeMp43πRp3 = 2×Me43πRe3 Mp = 2×1
53Megpge = GMpRp2GMeRe2= 2×1 531
52 = 3gp = 3gehence second is correct

if density of a planet is double that of the earth the radius 1.5 times that of the earth, the acceleration due to gravity on the surface of the planet is???a)3/4 times of earthb) 3 times of earth

if density of a planet is double that of the earth the radius 1.5 times that of the earth, the acceleration due to gravity on the surface of the planet is???
a)3/4 times of earth
b) 3 times of earth