Page 11 - Math Booklet Prep1first part1_Neat
P. 11
PPrriimmarryy56
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Note
IF Drawing scale = 1 : 500 000 this means that every 1 cm on
drawing represents 500 000 cm ( 5 km ) in reality
? If (The drawing scale < 1)
this expresses minimization ( reduction or shrinking ).
? If (the drawing scale > 1)
this expresses enlargement ( or magnification).
Example (1)
the distance between two cities is 90km and the length between them
on the map is 5cm . Find the drawing scale
Drawing : Real (÷ 5 )
5 cm : 90 km
5cm : 90 x 100 000 cm
Drawing scale = 1 : 1 800 000
?? 5 1 (÷ 5 )
Or drawing scale = ==
?? 90 × 100000 1800000
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