Non Destructive Testing and Evaluation MCQ: If the radiation intensity is 1 Gy/h (100 R/h) at a distance of 152.4 cm (5 feet) from a source, what is the intensity at 610 cm (20 feet)?

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If the radiation intensity is 1 Gy/h (100 R/h) at a distance of 152.4 cm (5 feet) from a source, what is the intensity at 610 cm (20 feet)?

Correct Answer: 0.0625 Gy/h (6.25 R/h)

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