Question

multiple choice question how can you determine the elevation of lines around the index contour on a topographic map? add or subtract the contour interval from the elevation indicated on the index contour. multiply or divide the contour interval from the elevation indicated on the index contour. add or subtract the index contour from the elevation indicated on the contour interval.

Explanation:

To find the elevation of contour lines around an index contour on a topographic map, you add or subtract the contour interval from the elevation indicated on the index contour. Index contours are darker and labeled with elevation values. The contour interval is the fixed vertical distance between adjacent contour lines.

Answer:

Add or subtract the contour interval from the elevation indicated on the index contour.