Contour lines cross ridge or valley lines at -
(a) 30 degrees
(b) 45 degrees
(c) 60 degrees
(d) 90 degrees.
The correct Answer Is
(d) 90 degrees
(a) 30 degrees
(b) 45 degrees
(c) 60 degrees
(d) 90 degrees.
The correct Answer Is
(d) 90 degrees