The document describes constructing a diagonal scale with a representative fraction (RF) of 1/500 to measure distances in meters and decimeters up to a maximum of 80 meters. It provides instructions to make a scale 16 cm long based on the given RF and maximum measurement. An example is then given to measure a distance of 47.8 meters using the new scale.

1. Engineering Graphics
DIAGONAL SCALE

2. Construct a Diagonal scale of R.F= 1/500 to read meters and decimeters.
It should be able to read maximum up to 80 meters. Measure a distance
of 47.8 meters.
8
7 0 70
Length of scale = (1/500) * (80*100 cm) = 16 cm
10 20
10
decimeter
Meter
40
47.8 meter
30 50 60
meter
1
3
5
10
2
4
6
7
9
1
2
5

4. Solution

5. 3 meter 5 decimeter 7 cm
3.57 meter =
cm
Meter
dm