Q$\mathrm{.}2.$ The Tri$-$axial test results for two specimens of same soil are as follows: First specimen failed at a deviator stress of $524k\frac{N}{m^2}$ when the cell pressure was $100k\frac{N}{m^2},$ while the second specimen failed at a deviator stress of $644k\frac{N}{m^2}$ under a cell pressure of $200k\frac{N}{m^2}.$ Find shear strength parameters for the soil analytically.

$20$