What is the psi corresponding to the 42 ft lift height?

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Multiple Choice

What is the psi corresponding to the 42 ft lift height?

Explanation:
Pressure from a water column grows with the height of the column. In feet of water, each foot adds about 0.433 psi. So for a 42 ft lift: 42 × 0.433 ≈ 18.2 psi, which rounds to 18 psi. That matches the given option. The other numbers would require much taller water columns (roughly 48.5 ft for 21 psi, about 110 ft for 48 psi, or around 224 ft for 97 psi), not the 42 ft height shown.

Pressure from a water column grows with the height of the column. In feet of water, each foot adds about 0.433 psi. So for a 42 ft lift: 42 × 0.433 ≈ 18.2 psi, which rounds to 18 psi. That matches the given option. The other numbers would require much taller water columns (roughly 48.5 ft for 21 psi, about 110 ft for 48 psi, or around 224 ft for 97 psi), not the 42 ft height shown.

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