hydraulic lift and fluid mechanics question?

Question

In a hydraulic lift, the maximum gauge pressure is 17.00 atm. If the diameter of the output line is 22.5 cm, what is the heaviest vehicle that can be lifted?

Answer 1

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area of line = π(11.25)² = 398 cm²

17 atm = 1722000 Pa = 1722000 N/m²

1722000 N/m² x 398 cm² x (1 m/100 cm)² = 68600 N

Answer 2

F/A = 17atm*101325N/m² = 1,722,525N/m²

F = 1,722,525 * π*0.225²/4 = 68,489N