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The scale of a drawing is given as 15:1. What is the representative fraction?

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The scale of a drawing is given as 15:1. What is the representative fraction?

(a) 15

(b) 0.15

(c) 1.5

(d) 1/15

The question was posed to me in exam.

The doubt is from Representative Factor topic in chapter Scales of Engineering Drawing

1 Answer

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Right choice is (a) 15

The best I can explain: The scale of the drawing is given as 15:1 that is an enlarging scale, this means dimensions are increased to 15 times of actual ones. So the representative factor is that dimension in drawing to actual dimension. R.F. = 15/1 = 15.

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