The solid shaft AB rotates at 720 rpm and transmits 50 kW from the motor M to machine tools connected to gears E and F. Knowing that $\tau_{all}$ = 42 MPa and assuming that 20 kW is taken off at gear E and 30 kW is taken off at gear F, determine the smallest permissible diameter of shaft AB.
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The solid shaft AE rotates at 500 rpm and transmits 45 kW from the motor M to the machine tools connected to gears G and H. Knowing that Tallow = 50 MPa and that 30 kW is taken off at gear G and 15 kW is taken off at gear H, determine the smallest permissible diameter of shaft AE. 100 mm 150 mm 200 mm 150 mm 75 mm 100 mm 100 mm
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