Explanation: To measure the length on the scale, the distance between the front edge that is the blue line and the last edge that is the dotted line for each letter is calculated.
The major division for this scale is 1 cm and minor division for this scale is 0.1 cm.
Conversion factor: 1 cm = 10 mm
Distance from the front line to the dotted line of A is 3.6cm which makes it as 36mm.
Distance from the front line to the dotted line of B is 2.2cm which makes it as 22mm.
Distance from the front line to the dotted line of C is 1.25cm which makes it as 12.5mm.
Distance from the front line to the dotted line of D is 0.7cm which makes it as 7mm.
