Find the area of the region bounded by ${y^2} = 9x,x = 2,x = 4$ and the $x$-axis in the first quadrant. [ NCERT Ex. 8.1, Q.2,Page 365]

Find the area of the region bounded by y^2 = 9x,x = 2,x = 4 and the x-axis in the first quadrant. [ NCERT Ex. 8.1, Q.2,Page 365]

Find the area of the region bounded by the curve y^2 = x and the lines x = 1,x = 4 and the x-axis. [ NCERT Ex. 8.1, Q.1,Page 365]