What does a line drawn at ¼ size that measures 3 1/8" represent?

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A line drawn at a scale of ¼ size means that every unit of measurement on the drawing represents four units in reality. To determine the actual measurement represented by a line measuring 3 1/8 inches at this scale, you need to multiply that measurement by 4.

First, convert the measurement of 3 1/8 inches to a fraction for easier calculation:

3 1/8 = 3 + 1/8 = 24/8 + 1/8 = 25/8 inches.

Next, multiply the fraction by 4 to find the actual measurement:

(25/8 inches) × 4 = 100/8 inches = 12.5 inches.

To convert inches to feet (since there are 12 inches in a foot):

12.5 inches ÷ 12 inches/foot = 1.04167 feet, which is equivalent to 1 foot and ½ inch.

This calculation confirms that a line measuring 3 1/8 inches at a scale of ¼ represents an actual measurement of 1 foot and ½ inch. Thus, the most accurate answer is that it represents an actual measurement of 1' ½".

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