Answer :

We know that acceleration due to gravity (g) is given by

Where G = universal gravitational constant;

M = mass of the planet;

R = radius of the planet;

Mass of Planet A = M_{A};

Radius of Planet A = R_{A};

Value of ‘g’ on A = g_{A};

Mass of Planet B = M_{B};

Radius of Planet B = R_{B};

Value of ‘g’ on B = g_{B};

Also it is given that;

Therefore;

(from question )

⇒

__Therefore the mass of planet B should be two times the mass of planet A i.e M _{B} = 2M_{A}__ .

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