The height of the hill is 520 ft
The height of the hill, h the length of the road, L and the ground form a right angled triangle with length of the road as the hypotenuse side and the height of the hill as the opposite side to the angle the road makes with the horizontal, Ф.
Now, from trigonometric ratios,
sinФ = h/L
Making h subject of the formula, we have
h = LsinФ
Since L = 2500 ft and Ф = 12°, thus
h = LsinФ
h = 2500 ft × sin12°
h = 2500 ft × 0.2079
h = 519.78 ft
h ≅ 520 ft to the nearest foot
So, the height of the hill is 520 ft
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