geometry

A fire hydrant that is 1.5 feet high casts a shadow that is 2.5 feet long. At the same time of day, a lamppost casts a shadow 15 feet long. What is the height of the lamppost?

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  1. the post's shadow is 6 times as long as the hydrant's.

    So, the post is 6 times as tall.

    or, using ratios,

    x/15 = 1.5/2.5

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  2. it is not 6 its 9 because 2.5/15=1.5/h cross multiply and divide

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