5- A class A pan was set up adjacent to a lake. The depth of water in the pan at the beginning of a certain week was 195 mm. in

that week there was a rainfall of 45 mm. 15 mm of water was removed from the pan to keep the water level within the specified depth range. If the depth of the water in the pan at the end of the weak was 190 mm, calculate the pan evaporation. Using a pan coefficient, Cp = 0.7.Estimate the evaporation from the lake in that week.

Fig: 1