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Lewis county, washington, has a guideline that new roads should not exceed a 15%
Lewis county, washington, has a guideline that new roads should not exceed a 15% grade, or a 15 foot rise over a horizontal distance of 100 feet. a proposed roadway rises 41 feet over 254 feet horizontally. find the grade of the proposed roadway to the nearest percent. does it meet the county’s guideline?
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To calculate this problem, divide the smaller number by the larger to get the grade or slope.
I.E. 15/100= .15 = 15%
41/254 = .16 = 16% NOPE, it doesnt meet county guidelines
hope it helps
Side one =3
Side two =13
side three =8
add them all together and it all = 24