Question

4) A hiker descended 320 feet in 40 minutes, then ascended 10 feet per minute for the next 25 minutes.Find the hiker's overall change in elevation

Answer 1

Let's draw this situation

We can add the distances as follows,

$d_{final}=-320+10*25$

thus,

$d_{final}=-320+250=-70$

We can see that the hiker's overall change in elevation was -70 feet, which means that he descended 70 feet from the original position.