AMSL and skiing

Tomas skis from point A (3200m above sea level) to place B. The Hill has a 20% descent. The horizontal distance between the start and finish is 2.5 km. At what altitude is point B?

Correct answer:

B =  2700 m AMSL

Step-by-step explanation:

$$\begin{gathered} A=3200\text{m} \\ p=20\%=\frac{20}{100}=\frac{1}{5}=0.2 \\ x=2.5\text{km}\to \text{m}=2.5\cdot 1000\text{m}=2500\text{m} \\ B=A-p\cdot x=3200-0.2\cdot 2500=2700\text{m}\text{AMSL} \end{gathered}$$

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