The pressure of the system is 13 ponds/square inches.
The hydraulic press has two arms and the pressure applied on one arm is equal to the pressure applied on the other arm. The force could be given in pounds or Newton.
Hence,
A1 = 5.33 square inches
A 2 = 10 square inches
F1 = 70 pounds
F2 = ?
F2 = F1[A2/A1]
F2 = 70[10/5.33]
F2= 131 pounds
Pressure of the system = 131 + 70/ 10 + 5.33 = 13 ponds/square inches
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