A hydraulic cylinder producing a force of 2000 lb shows the
     A hydraulic cylinder producing a force of 2000 lb shows the following reading Pressure at head end P1 = 378 psi  Pressure at rod end P2 = 52 psi  Rod diameter d = 0.35 in.  Calculate the piston diameter D.   
  
  Solution
By force balance
P1*A1=P2*A2+F
So
378*(÷4)D2=52*(÷4)*(D2-.352)+2000
Solving
D=2.8inch

