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The height of an object varies directly with the length of its shadow. A person who is 6 feet tall casts a 15-foot shadow. How long is the shadow of a 20-foot tree? answer

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  1. If the shadow length is s, and the height is h, then

    h = ks

    That means that h/s = k, a constant. So, you want s such that

    6/15 = 20/s

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  2. The height of an object varies directly with the length of its shadow. A person who is 6 feet tall casts a 15-foot shadow. How long is the shadow of a 20-foot tree?

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