Posted by pramod on Tuesday, March 27, 2012 at 10:55am.
How is this a challenge?
a google search shows up the simple formula
E=2G(r+1)
2*10^11 = 2*8*10^10(r+1)
1/8 * 10 = r+1
1.25 = r+1
0.25 = r
Also, for Bulk modulus K,
E = 3K(1-2r)
2*10^11 = 3K(1-2*.25)
2*10^11 = 1.5K
K = 1.33*10^11
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