Draw a scale when 2 cm = 1m, to read decimeters, to measure maximum distance of 6 m. Show on it a distance of 4 m and 6 dm.
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2DIMENSIONS OF LARGE OBJECTS MUST BE REDUCED TO ACCOMMODATE ON STANDARD SIZE DRAWING SHEET-THIS REDUCTION CREATES A SCALE OF THAT REDUCTION RATIO, WHICH IS GENERALLY A FRACTION.. SUCH A SCALE •S CALLED REDUCING SCALE AND THAT RATIO IS CALLED REPRESENTATIVE FACTOR. SIMILARLY IN CASE OF TINY OBJECTS DIMENSIONS MUST BE INCREASED FOR ABOVE PURPOSE. HENCE THIS SCALE IS CALLED ENLARGING SCALE. HERE THE RATIO CALLED REPRESENTATIVE FACTOR IS MORE THAN UNITY. USE FOLLOWING FORMULAS FOR THE CALCULATIONS IN THIS TOPIC. FOR FULL SIZE SCALE R.F.=I OR ) MEANS DRAWING & OBJECT ARE OF SAME SIZE. Other RFs are described as 1:100, 1:1000, A B DIMENSION OF DRAWING REPRESENTATIVE FACTOR (R.F.) = DIMENSION OF OBJECT LENGTH OF DRAWING ACTUAL LENGTH AREA OF DRAWING ACTUAL AREA VOLUME AS PER DRWG. ACTUAL VOLUME LENGTH OF SCALE = R.F. X MAX. LENGTH TO BE MEASURED.