In a hollow circular shaft of outer and inner diameters of 40 mm and 30 mm respectively, the shear stress is not to exceed 88N/mm2.Find the maximum torque which the shaft can safely transmit.
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Note: part 2 of this question for which angle of twisting has been not written perfectly in question. So I have considered 2 degree in 10.6 m shaft length.
Concept will remain same you just need to change your actual value