1. A 50 mm diameter solid circular shaft transmits the power at 400 rpm. Find the maximum horsepower if the allowable shearing stress is 50 MPa.
2. Calculate the horsepower that a solid circular shaft 5 in. in diameter transmits at 200 rpm if the allowable shearing stress is 7,000 psi.
3. Calculate the developed torque on a hollow solid circular shaft 3 in. outer diameter and 2 in. inner diameter if the allowable shearing stress is 8,000 psi.