Let us analyze the evaporation rate along a river that was recently dammed. suppose the lake is currently 50 yards wide, and getting wider at a rate of 3 yards per week. as the lake fills, it gets longer, too. suppose it is currently 950 yards long, and it is extending upstream at a rate of 15 yards per week. assuming the lake remains approximately rectangular as it grows, find 50 950 yds yds the river the dam a) the current area of the lake, in square yards;