Chapter 1, Problem 1.44PP

One measure of a baseball pitcher's performance is earned run average or ERA. It is the average number of earned runs allowed if all the innings pitched were converted to equivalent nine-inning games Therefore, the units for ERA are runs per game,

1.44 A hydraulic cylinder must be able to exert a force of $8700$ lb. The piston diameter is $1.50$ in. Compute the required pressure in the oil.