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Let the distance from the George at which the camera must be set in order to see his head and feet is .

Draw the related diagram for situation:

Consider .

.

If the camera is set at a distance of from George, his feet will not be seen by the lens. The camera would need to be moved back about  additional foot.

The distance from the George at which the camera must be set in order to see his head and feet is .

The distance from the George at which the camera must be set in order to see his head and feet is . \ \