A cylindrical specimen of elastic isotropic rock was loaded in a triaxial cell with a confining pressure of 4 MN/m2 and an axial stress of 33 MN/m2. Strain gauges attached to the specimen indicated an axial strain of 850 microstrains with a lateral (extensile) strain of –20 microstrains. (note: 1 microstrain = 10-6 and 1 MN/m2 = 106 N/m2).

? Calculate the Elastic Modulus (E) and Poisson’s ratio ?.