A hollow steel shaft has outside diameter d and inside diameter \(\frac{d}{2}\). The value of d for the shaft, if it has to transmit 200hp at 105 rpm with a working shear stress of 420 kg/cm2, is

A hollow steel shaft has outside diameter d and inside diameter \(\fra

1.	A hollow steel shaft has outside diameter d and inside diameter \(\frac{d}{2}\). The value of d for the shaft, if it has to transmit 200hp at 105 rpm with a working shear stress of 420 kg/cm2, is
A.	5.6 cm
B.	2.6 cm
C.	12.1 cm
D.	15.5 cm
Answer» D. 15.5 cm

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A hollow steel shaft has outside diameter d and inside diameter \(\frac{d}{2}\). The value of d for the shaft, if it has to transmit 200hp at 105 rpm with a working shear stress of 420 kg/cm2, is

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