In a pure orthogonal turning by a zero rake angle single point carbide cutting tool, the shear force has been computed to be 400 N. The cutting velocity, V_c = 100 m/min, depth of cut, t = 2.0 mm, feed, 𝒔_𝟎 = 0.1 mm/revolution and chip velocity, V = 20 m/min, the shear strength, 𝝉_𝒔 of the material will be ___________________ MPa (round off to two decimal places).