Aperson who is 6ft tall walks away from a streetlight. when the person is 15 feet away from the light, the tip of his shadow is 5 feet in front of him. find the height of the streetlight

We essentially have a ratio here:


Since we know the ratio is going to stay constant at , we can use this to find the height of the lamp along with the information that the total distance from the lamp to the tip of his shadow is 20:

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