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10 May, 10:59

A person is standing 40 ft from a light post and can see the top of the light at a 35∘ angle of elevation. The person's eye level is 5 feet from the ground. What is the height of the lightpost to the nearest foot. The height of the light post is feet.

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  1. 10 May, 13:35
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    Height of light post = 33 feet

    Step-by-step explanation:

    We will use the trigonometric ratios to find the height of light post

    The given scenario forms a right angled triangle with the right angle with the light post.

    The distance between light post and the person is the base.

    So, base = b = 40 feet

    The height of light post will be the perpendicular

    So,

    Perpendicular = p = x

    Angle = 35°

    So,

    tan (angle) = p/b

    tan 35° = p/40

    0.7002 = p/40

    0.7002*40 = p

    p = 28 feet

    Since the persons eye level is 5 feet from the ground, 5 feet will be added to perpendicular for actual height of light post.

    Height of light post = 28+5 = 33 feet ...
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