FE Civil Engineering Exam Prep

Answer: C - The horizontal distance H for a slope measurement of 814.20 ft and angle of 6°30’ is 808.96 ft.

Solution

Use the horizontal distance formula H = L cos a

Where L = 814.20 ft
A = 6°30’

Step 1

Convert angle 6°30’ to DMS: 6°30’ = 6.5°

Step 2

H = L cos 6.5 = (814.20 ft)(0.994) = 808.96 ft