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Contour practice

Contours shown in 1/2 foot intervals on a plan in which the slope must be kept under 20%, what is the minimum distance in plan that proposed contours can be spaced?
A. 2 1/2 feet
B. 5 feet
C. 10 feet
AnswerA. 2 1/2 feet, (20% = 20/100=1/5 = 5) x 1/2 contour intervals = 2 1/2 feet

ARE 4.0 exam prep: SPD

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