A shear vane of $7\mathrm{.}5$ cm $-$diameter and $11\mathrm{.}0$ cm length was used the measure the shear strength of soft clay. If torque $6000kg-cm$ was required to shear the soil, calculate the shear strength. Assume triangular distribution of shear strength mobilization at the ends of the soil cylinder. The vane was then rotatedrapidly to cause remoulding of the soil. The torque required in the remoulded state was $200$ kg $-$ cm $.$ Determine the senstivity of the sol.