Question

An inclined walkway leading to a new building is to rise 13 inches for each horizontal distance of 21 feet. Write this slope as a grade. (Round to the nearest tenth of a percent if necessary.)

a. 61.9%
b. 5.2%
c. 161.5%
d. 1938.5%

Answer 1

13/(21x12) x 100 \[\approx\] 13/240 x 100 \[\approx\] 5
which means b.