Plain Scale to Show Meters and Centimeters

To construct a plain scale to show meters and centimeters with a given RF (1:400) and a length of 60 meters, we can use the following steps:

Step 1: Determine the length of the scale
The length of the scale can be determined by dividing the given length (60 meters) by the RF (1:400).
Scale Length = Length / RF = 60 meters / 400 = 0.15 meters

Step 2: Determine the number of divisions
Next, we need to determine the number of divisions on the scale. Since the scale length is 0.15 meters, we can divide it into 15 equal parts to represent centimeters.

Step 3: Mark the major divisions
To mark the major divisions, divide the scale length into equal parts according to the desired interval. In this case, mark 15 major divisions, each representing 1 meter.

Step 4: Mark the minor divisions
Within each major division, mark 10 minor divisions to represent centimeters. This will give a total of 150 minor divisions on the scale.

Step 5: Label the major divisions
Label the major divisions starting from 0 at the leftmost end of the scale and incrementing by the desired interval (1 meter) until the end of the scale (60 meters).

Step 6: Label the minor divisions
Label the minor divisions within each major division, starting from 0 and incrementing by 1 until 9. Repeat this for each major division.

Step 7: Draw the scale
Now, draw a straight line of the determined scale length (0.15 meters) on a sheet of paper or any suitable material. Mark the major and minor divisions along the line, as per the markings determined in the previous steps.

Step 8: Show the distance of 43 meters
To show the distance of 43 meters on the constructed scale, locate the point corresponding to the 43-meter mark on the scale. Use a straight line to connect this point to the zero mark at the leftmost end. The length of this line represents the distance of 43 meters on the scale.

By following these steps, you can construct a plain scale to show meters and centimeters with a given RF and a length of 60 meters. This scale can then be used to measure distances accurately, including the distance of 43 meters.