Answer: The answer is 127 millimetres by 177.8 millimetres.
Step-by-step explanation: Given that Chris has a photograph of size 5 inches by 7 inches, which he resized into a passport photograph. We are to find the original size of the photograph in millimetres.
The original size of the photo = 5 inches by 7 inches.
We know,
1 inch = 25.4 millimetres.
Therefore, 5 inches = 5 × 25.4 = 127 millimetres,
and 7 inches = 7 × 25.4 = 177.8 millimetres.
Thus, the original size will be 127 millimetres by 177.8 millimetres.
