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The length of the drawing is 50 mm, the scale is given as 1:5. Find the actual length.

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The length of the drawing is 50 mm, the scale is given as 1:5. Find the actual length.

(a) 50 cm

(b) 10 cm

(c) 25 cm

(d) 10 mm

I had been asked this question in homework.

This interesting question is from Representative Factor in chapter Scales of Engineering Drawing

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Right option is (c) 25 cm

To explain I would say: The scale given is 1:5 (reducing scale) that is the drawing is made with 1/5th of actual dimensions. So we have to multiply the drawing length with 5. 50 mm x 5 =250 mm and 1 cm =10 mm. The actual length in cm is 25.

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