At 61 cm (two feet) from a radiation source, radiation intensity is 3 Gy/h (300 R/h). What is the Intensity at 244 cm (8 feet) from the source?

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Q. At 61 cm (two feet) from a radiation source, radiation intensity is 3 Gy/h (300 R/h). What is the Intensity at 244 cm (8 feet) from the source?

(A) 0.12 Gy/h (12R/h)
(B) 1.2 Gy/h (120 R/h)
(C) 0.1875 Gy/h (18.75 R/h)
(D) 0.28 Gy/h (28 R/h)

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✅ Correct Answer: (C) 0.1875 Gy/h (18.75 R/h)

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