A body weight 700 g wt on the surface of the earth. How much will it weight on the surface of a planet whose mass is 1/7 and radius is half that of the earth

Q: A body weight 700 g wt on the surface of the earth. How much will it weight on the surface of a planet whose mass is 1/7 and radius is half that of the earth

(a) 200 g wt

(b) 400 g wt

(c) 50 g wt

(d) 300 g wt

Ans: (b)