Assuming the lowest elevation is sea level and that the contour interval is 50 feet, what is the approximate difference in elevation between point f and point a?

a) 0 feet
b) 25 feet
c) 100 feet

C) 100 feet

Explanation:

There are two contour lines in between A and F, so multiply your contour interval (50 feet) by 2 to get 100.

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