Two circular solid shafts of diameters 4 cm and 6 cm respectively transmit same power at the same speed. The maximum shear stress in the 4 cm diameter shaft is 50 MPa. The maximum shear stress in the 6 cm diameter shaft will be approximately:

Two circular solid shafts of diameters 4 cm and 6 cm respectively tran

1.	Two circular solid shafts of diameters 4 cm and 6 cm respectively transmit same power at the same speed. The maximum shear stress in the 4 cm diameter shaft is 50 MPa. The maximum shear stress in the 6 cm diameter shaft will be approximately:
A.	50 MPa
B.	168.75 MPa
C.	15 MPa
D.	None of these
Answer» D. None of these