Area of the region bounded by the curve y2 = 4x, y-axis and the line y = 3 is
The area bounded by the curve y2 = 4x, y-axis and the line y = 3 is shown by shaded region in above figure.
Thus, Area OAB 
Therefore, required area is = 
.
13
Area of the region bounded by the curve y2 = 4x, y-axis and the line y = 3 is
The area bounded by the curve y2 = 4x, y-axis and the line y = 3 is shown by shaded region in above figure.
Thus, Area OAB
Therefore, required area is = .