The question is asking how many inches a 20-yuan photo taken at the dissolution hole (likely referring to a tourist attraction) would be.
To answer this, I’ll assume that “二十” refers to Renminbi (RMB), which is the official currency of China. Twenty yuan approximately equals $2.92 USD or €2.65 EUR, considering current exchange rates.
That being said, it’s difficult for me to provide an exact inch measurement based on the given information without more context. However, I can infer that 20-yuan photos are usually larger than those sold at a lower price point and might be around A4 paper size (210 mm x 297 mm or approximately 8.27 in x 11.69 in).