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By converting angle from degrees to radians, 40° is equal to

By converting angle from degrees to radians, 105° is equal to

π⁄3 radians are equal to

3π⁄2 radians are equal to

2π radians are equal to

π radians are equal to

The channel section of uniform thickness 2mm shown in the figure is subjected to a torque of 10 Nm. If it is made of a material with shear modulus of 25 GPa, the twist per unit length in radians/m is