JAMB - Geography (1987 - No. 1)
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?
The Gradient along a straight line between the two places is approximately?
1 : 2
1 : 20
1 : 200
1 : 2000