On a map of scale 1:50 000 with contour interval at 20 meters, two places are 4cm apart and one lies five contour intervals higher than the other.
The Gradient along a straight line between the two places is approximately?
A.
1 : 2
B.
1 : 20
C.
1 : 200
D.
1 : 2000
Correct Answer: Option B
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