Using the equation: head = (?P x 144) ÷ D, calculate a pump’s head, in feet of water, with a measured pressure drop across the pump of 9.4 psi. Assume water has a density of 62.4 pounds per cubic foot.

a. 4.07'
b. 21.69'
c. 0.047'
d. 18.45


b. 21.69'

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