1) What is the change in elevation between contour line A and contour line B a) 20 meters b) 40 meters 2) What is the change in elevation between contour line A and contour line C a) 40 meters b) 60 meters 3) What is the change in elevation between contour line A and contour line D a) 60 meters b) 80 meters 4) What is the change in elevation between contour line B and contour line C a) 10 meters b) 20 meters 5) What is the change in elevation between contour line B and contour line D a) 20 meters b) 40 meters 6) What is the change in elevation between contour line C and contour line D a) 80 meters b) 20 meters

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