AlgebraMediumHours for a hiker to descend
Algebra practice question
A hiker starts at an altitude of 2,400 metres and descends at a steady rate of 300 metres per hour. After how many hours will the hiker be at an altitude of 900 metres?
Answer: 5
2,400 − 300t = 900 gives 300t = 1,500, so t = 5.
Common wrong answers
- If you answered 3
- 3 is the time to descend 900 metres.
- If you answered 8
- 8 is the time to reach sea level.
- If you answered 11
- 11 adds the two altitudes and divides by 300.
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