A hollow shaft do = 2di where do and di are the outer and inner diameters respectively needs to transmit 20kW power at 3000 RPM. If the maximum permissible shear stress is 30 MPa, dO is

A hollow shaft do = 2di where do and di are the outer and inner diamet

1.	A hollow shaft do = 2di where do and di are the outer and inner diameters respectively needs to transmit 20kW power at 3000 RPM. If the maximum permissible shear stress is 30 MPa, dO is
A.	11.29 mm
B.	22.58 mm
C.	33.08 mm
D.	45.16 mm
Answer» C. 33.08 mm

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A hollow shaft do = 2di where do and di are the outer and inner diameters respectively needs to transmit 20kW power at 3000 RPM. If the maximum permissible shear stress is 30 MPa, dO is

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