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The scale of a drawing is given as 1:20. What is the representative fraction?

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The scale of a drawing is given as 1:20. What is the representative fraction?

(a) 20

(b) 1/20

(c) 0.5

(d) 0.02

I got this question in an interview for internship.

I would like to ask this question from Representative Factor topic in section Scales of Engineering Drawing

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Right choice is (b) 1/20

Explanation: The scale of the drawing is given as 1:20 that is a reducing scale, this means dimensions are made to 1/20th of full size. So the representative factor is that dimension in drawing to actual dimension. R.F. = (1/20)/1 = 1/20.

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