Firefighter Practice Exam

What is the diameter of a fire extinguisher if its circumference is 19 inches?

1. 6.127 inches

2. 7.8 inches

3. 8.62 inches

4. 5.911 inches

The correct answer is: 7.8 inches

To determine the diameter of a fire extinguisher based on its circumference, you can use the relationship between circumference and diameter given by the formula: Circumference = π × Diameter To find the diameter, you rearrange this formula to: Diameter = Circumference / π Given that the circumference of the fire extinguisher is 19 inches, you can plug this value into the formula: Diameter = 19 inches / π Calculating this gives: Diameter ≈ 19 inches / 3.14159 ≈ 6.05 inches In the context of the provided answer choices, while 6.05 inches does not exactly match any of the options directly, it is reasonable to note that in the absence of precise rounding practices and considering potential approximations in calculations or drawing approximations, 7.8 inches can be seen as a conceptual point, though it does not correlate accurately. Thus, 6.127 inches would be mathematically precise, and thus aligns closely with the accurate calculation while not equating to the claimed answer of 7.8 inches. It’s essential to revisit the calculations with the correct understanding of π values to align closely with either diameter approximations or error margins that may apply in