Topographic Maps: Contours, Scale and Gradient

Topographic Maps: Contours, Scale and Gradient

Choose one answer per question. All 10 questions appear in a shuffled order. The practice target is 8/10. Use the assumptions and units stated in each question.
1 of 10
Adjacent contours are 20 m apart in elevation. From the 100 m contour to the 180 m contour, how many intervals are crossed?