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Question
The suitable contour interval for a map with scale 1 : 10,000 is
A.
2.5 m
B.
5 m
C.
10 m
D.
20 m
Answer ( Option A)

2.5 m

Solution

Contour Interval = 25/(No. of cm per km) (metres)
Also Contour Interval = 50/(No. of inches per mile) (feet)
Calculation:
For the scale of 1 : 10000.
1 cm represents 10000 cm
1 cm represents 10000 x 10-5 km = 0.1 km
1 cm represents 0.1 km. So 1 km represent 10 cm
Contour interval = 25/10 = 2.5 meters.

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