Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Three-dimensional Geometry

Question:

Area bounded by the parabolas $y^2=4x $ and $x^2 =4y$ is :

Options:

$\frac{16}{3}$

16

$\frac{8}{3}$

$\frac{32}{3}$

Correct Answer:

$\frac{16}{3}$

Explanation:

The correct answer is option (1) → $\frac{16}{3}$

finding points of intersection

$x^2=4y⇒x^4=4×4y^2$

$⇒x^4=16×4x$

so $x=0$ or $x=4$

$y=0$ or $y=4$

area = $\int\limits_0^42\sqrt{x}-\frac{x^2}{4}dx=\frac{16}{3}$ sq. units