A soil has an unconfined
compressive strength of 1.20 kg/cm2. In a tri
axial compression test, a specimen of the
same soil is subjected to a chamber pressure
of 0.40 kg/cm2, failed at an additional stress
of 1.60 kg/cm2. The cohesion of the soil in
kg/cm2 is most likely:
a. 0.713 c. 0.424
b. 0.531 d. 0.633