1. What is the slenderness ratio of a solid circular bar 30 in. long and 2 in. in diameter?
2. Calculate the slenderness ratio of a rectangular bar 1.5 in. x ¾ in. and 20 in. long.
3. Calculate the compressive stress of a hollow circular machine part ¾ in. long and made of steel with an outer diameter of 4 in. and an inner diameter of 2 in. Use 80,000 lb as a compressive force.