In a remote village, Rajan and Keiko decide to go to the local lake for a day of relaxation. They walk down to the water's edge where they find the lake to be calm and inviting. As both are wearing long pants, they cautiously wade into the water. Rajan, who is taller than Keiko, wades in until the water is just below his knees. Keiko, eager to enjoy the water as well, follows Rajan but finds the water level to come up to just above her knees. A curious onlooker, Xiu, sitting on a bench a few yards away, watches Rajan and Keiko as they wade in further. Given the differences in their heights and the level of the water on their bodies, Xiu wonders what parts of Rajan's and Keiko's clothing are wet and how is it relative to their heights. Assuming the lake's floor is relatively flat and even, what can Xiu deduce about the wet portions of their clothing and how it relates to their physical differences?

Provide a short response.
Given that the water level reaches just below Rajan's knees and just above Keiko's knees, Xiu can infer that the water has made contact with a greater proportion of Keiko's pants in comparison to Rajan's. This is not because the water is deeper where Keiko is standing, since the lake's floor is flat and even, but rather because Keiko is shorter than Rajan. Since the lake is calm and there are no waves to create splashing, the wet portion of their clothing will be confined to where the water makes direct contact. 

Considering this, the lower portion of Rajan's pants up to just below his knees will be wet. For Keiko, the wet area extends slightly higher, above her knees. Therefore, even though both are standing in the same depth of water, the difference in their heights means that the water reaches different points on their bodies. Xiu, observing from a distance, would visually confirm the wet levels on their clothing by seeing a darker coloration where the fabric is saturated with water, providing a clear demarcation line. The portion of their pants below these lines would be wet, and above these lines would remain dry.

Additionally, since water is prone to adhere to fabrics and wick upwards slightly above the actual water line due to capillary action, Xiu might notice that their pants could be damp just a bit higher than the actual water level. However, the fundamental reasoning based on their height differences remains -- Keiko's clothing will be wet at a higher point on her legs compared to Rajan's.