Question

A student notices that the shadows of a sign and a tree lie along the same line and end at the same point. The height of the sign is 3 feet. The length of the tree's shadow is 20 feet. The distance from the base of the sign to the vase of the tree is 16 feet. How tall is the tree?
Ms. Sue
20 - 16 = 4 ft. >> length of sign's shadow

Cross multiply and solve this proportion.

3/4 = x/20


15 ft

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