A pipe with 8 feet in diameter and 12 feet long contains approximately how many gallons?

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Prepare for the New York City Refrigeration License Exam I. Utilize flashcards, multiple-choice questions, and detailed explanations to boost your readiness. Ace your licensing exam!

Multiple Choice

A pipe with 8 feet in diameter and 12 feet long contains approximately how many gallons?

Explanation:
Think about the pipe as a cylinder. Its volume comes from the cross‑sectional area times the length, so V = πr^2h. The radius is half of the diameter, so r = 4 ft and h = 12 ft. This gives V = π(4)^2(12) = π(16)(12) = 192π cubic feet, which is about 603 cubic feet. Convert cubic feet to gallons: 1 cubic foot ≈ 7.48 gallons. So 603 × 7.48 ≈ 4510 gallons. The closest option is the one around 4510 gallons.

Think about the pipe as a cylinder. Its volume comes from the cross‑sectional area times the length, so V = πr^2h. The radius is half of the diameter, so r = 4 ft and h = 12 ft. This gives V = π(4)^2(12) = π(16)(12) = 192π cubic feet, which is about 603 cubic feet.

Convert cubic feet to gallons: 1 cubic foot ≈ 7.48 gallons. So 603 × 7.48 ≈ 4510 gallons. The closest option is the one around 4510 gallons.

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