density decreases by a factor of 1/5
4 Answers
Shaswata Roy
·2013-02-08 05:02:06
g = GMr2 = 4GÏr33r2=4GÏ€rÏ
4GÏ€r1Ï1 = 4GÏ€(5r1)Ï12
Ï2 = Ï1/5
Density should be decreased to one-fifth.