Question 21. (A) What is the gradient between the top of Howard Knob and BM T90 at the
intersection of US 421 and the New River, east of Boone?
ft (relief from Q20...a.k.a. rise)
per
miles (run measured on map to one decimal)
(B) Convert the rise and run to the same units. (It does not matter if you convert
feet to miles or miles to feet, so long as the units are the same. 1 mile = 5,280
feet). Show your
work.
(C) Now that your units are the same, calculate the percent slope. Show your
work.
Remember: Percent slope = (rise/run) x 100
%