A man weights 80 kg on earth surface. The height above ground where he will weigh 40 kg is (radius of earth r)

A man weights 80 kg on earth surface. The height above ground where he

1.	A man weights 80 kg on earth surface. The height above ground where he will weigh 40 kg is (radius of earth r)
Answer» 0.31 TIMES r 0.414 times r 0.51 times r 0.61 times r Answer :B