The area of the region bounded by the parabola $y^2=8 x$ and the line $x=2$ is : |
$\frac{16}{3}$ sq. units $\frac{32}{3}$ sq. units $\frac{8}{3}$ sq. units $\frac{11}{3}$ sq. units |
$\frac{32}{3}$ sq. units |
$y^2 = 8x~~~~~x = 2$ for x = 2 $y^2 = 8×2$ $\Rightarrow y^2=16 \Rightarrow y= \pm 4$ points of intersection $(2, \pm 4)$ as parabola is symmetric about x-axis about x-axis area region I + area region II = 2 × area region I So area of parabola = A = $2 \int\limits_0^2 y d x$ So A = $2 \int\limits_0^2 x 2 \sqrt{2} \sqrt{x} d x$ $y^2 = 8x$ $y=2\sqrt{2} \sqrt{x}$ $=4 \sqrt{2}\left[\frac{x^{\frac{1}{2}+1}}{\frac{1}{2}+1}\right]_0^2 \Rightarrow \frac{8 \sqrt{2}}{3}\left[2^{\frac{3}{2}}\right]$ $\frac{8}{3} \sqrt{2} \times 2 \sqrt{2}=\frac{32}{3}$ sq. units |