Answer:
The approximate elevation of the "ojos del salado" volcano is 19,686 feet above sea level
Explanation:
Let
y -----> elevation of the "ojos del salado" volcano
x -----> elevation of the "khangar" volcano
we know that
The elevation of the "ojos del salado" volcano is about 3 times as great as the khangar volcano
so
----> equation A
we have

substitute the value of x in the equation A
therefore
The approximate elevation of the "ojos del salado" volcano is 19,686 feet above sea level