Question

using the map, calculate the contour interval for this topographic map

1. 180m
2. 20m
3. 80m
4. 100m

thank you to whoever answers this <3

Answer 1

there are five contour lines between 180 and 80 so...
$\frac{(180 - 80)}{5} = 20$
2. 20m is the answer