Question

#20
A straight section of highway in the Midwest maintains a grade (slope) of 4%, or 1/25, for 12 miles. How much does your elevation change as you travel the road?


-Please help me understand by showing your work!! Thank you! :)

Answer 1

0.48 miles

Step-by-step explanation:

Step 1

It is given that the grade(slope) is 4%. This means that for every 100 miles traveled, the elevation changes by 4 miles.

Step 2

Hence for a distance of 12 miles , the elevation changes by 12*4/100 = 48/100 = 0.48 miles. [Using direct proportion]