The weight of a body on the earth is $400\,N$. Then weight of the body when taken to a depth half of the radius of the earth will be ............ $N$
- [JEE MAIN 2023]
- A$0$
- B$300$ $N$
- C$100$ $N$
- D$200$ $N$
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- [JEE MAIN 2020]
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