Answer:
18840 lbf
Step-by-step explanation:
Considering the physical equation:

It is possible to determine the force exerted by the piston if the maximum pressure developed (
) and the area (
) are previously known.
The area of the piston can be known through:

Being

Then

On the other hand, physical units of pressure in PSI are
, where the force is given in lbf.
Finally, the exerted force is:
