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Mathematics 20 Online
OpenStudy (anonymous):

A tree casts a 25 foot shadow. At the same time of day, a 6 foot man standing near the tree casts a 9 foot shadow. What is the approximate height of the tree to the nearest foot?

OpenStudy (mathsolver):

17 feet. Because the scale factor between the man and it's shadow is 1.5 so the tree's shadow must have the same ratio

OpenStudy (campbell_st):

use ratio of similar shapes |dw:1337285770656:dw| \[\frac{x}{6}=\frac{25}{9}\] solve for x

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