A 20mm line, drawn on the drawing sheet represents an actual

a-20mm-line-drawn-on-the-drawing-sheet-represents-an-actual

A 20mm line, drawn on the drawing sheet represents an actual length of 5m. What is the representative factor?
A. 1:2.5
B. 1:25
C. 25:1
D. 1:250

Right option is D. 1:250