Chapter 1, Problem 1.46PP

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.

1.46 A hydraulic cylinder must be able to exert a force of $38.8$ kN. The piston diameter is $40$ mm. Compute the required pressure in the oil.