Chapter 1, Problem 1.52PP

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,

1.52 The maximum pressure that can be developed for a certain fluid power cylinder is $15.0$ MPa. Compute the required diameter for the piston if the cylinder must exert a force of $30$ kN.