The summer palace covers an area of about 290 hectares, of which the water area is about three times that of the land area. How many hectares of land and water are there in the summer palace
There are x hectares of land and 3x hectares of water
3X+X=290
X=72.5
So the land is 72.5 hectares
Water surface 3 × 72.5 = 217.5 ha