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21-07-2017
Mathematics

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A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah?

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21-07-2017

s/18=64/288 multiply both sides by 18

s=1152/288

s=4 ft

So Sarah is four feet tall.

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