Construct a scale on a R.F. of 1:40000 so that one can read Kilometres and metres directly on it.
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Answer:
The word scale is generally used for an instrument used for drawing straight lines. But actually in Geographer’s language scale means the proportion or ratio between the dimensions adopted for the map and the corresponding dimensions on the ground. It can be indicated in two different ways. Example: The actual dimensions of the room say 10m x 8m cannot be adopted on the drawing. In suitable proportion the dimensions should be reduced in order to adopt conveniently on the drawing sheet. If the room is represented by a rectangle of 10cm x 8cm size on the drawing sheet that means the actual size is reduced by 100 times.
Representing scales: The proportion between the drawing and the map can be represented by two ways as follows:
a) Scale: – 1cm ≡ 1m or 1cm ≡ 100cm or 1:100
b) Representative Fraction: – (RF) 1/100 is the ratio between the size of the drawing and the object.
Answer:
Explanation:
Calculate the R.F. and construct a plain scale to read kilometers and hectometers, for max. 12 km. Show a distance of 8.3 km on it. CONSTRUCTION:- a) Calculate R.F. R.F.= 45 cm/ 36 km = 45/ 36 . 1000 . 100 = 1/ 80,000 Length of scale = R.F. max. distance = 1/ 80000 12 km = 15 cm b) Draw a line 15 cm long and divide it in 12 equal parts. Each part will represent larger division unit. c) Sub divide the first part which will represent second unit or fraction of first unit. d) Place ( 0 ) at the ...