Problema Solution
The surface, or rim, of a canyon is at an altitude of 65m. On a hike down into the canyon, a party of hikers stops for a rest 128m below the rim. Then they descend another 71m. What is their new altitude?
Answer provided by our tutors
65 - (128 + 71) = 65 - 199 = - 135 m
Their new altitude is 135 m bellow sea level.