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New York State Earth Science June 2006 - Question 43 PDF Print E-mail
Written by The Earth Science Wizard   
Sunday, 29 November 2009 03:37


(43) Correct answer: Option (2) 250 ft/mi

 

Steps of the calculation

Slop (gradient) = Vertical distance/Horizontal distance

Also known as rise (vertical distance) and run (Horizontal distance)

Since contour interval is = 100m

Vertical distance = Height of the higher elevation point (C) – Height of the lower elevation point (D)

(Rise)

= 1500 – 1000 = 500m

Horizontal distance = given line represent the distance along the hill slope where it is needed to calculate the slope. According to the scale given, we have to obtain horizontal distance.

Length between C-D is 2 units (use a ruler to find out this length).

According to the scale, 1unit = 1Km. So distance between C-D is = 2Km

Slop = 500feet/2mile = 250ft/mi
 

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