An x-ray of a leg bone fracture was made with an FFD of 80cm and an OFD of 16cm. On the x-ray film a crack in the bone measured 6.25cm in length. What is the actual length of the crack in this bone?
A. 0.2cm
B. 6.25cm
C. 5.0cm
D. 7.8cm
Answer: C
Mathematics
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