CBSE 2022 · Region 3 · Set 1 · Q11 · 4 marks
Find the area of the region bounded by curve $\displaystyle 4 x^{2}=\mathrm{y}$ and the line $\displaystyle \mathrm{y}=8 x+12$, using integration.
Marking-scheme solution
Correct Figure
Point of intersection
\[\begin{aligned}
& 4 x^{2}=8 x+12 \\
& x^{2}-2 x-3=0 \\
& (x-3)(x+1)=0 \\
& x=3,-1
\end{aligned}
\]
\[\begin{aligned}
\text { Area } & =\int_{-1}^{3}\left[(8 x+12)-4 x^{2}\right] d x \\
& \left.=4 x^{2}+12 x-\frac{4}{3} x^{3}\right]_{-1}^{3} \\
& =36+36-36-\left(4-12+\frac{4}{3}\right) \\
& =44-\frac{4}{3}=\frac{128}{3}
\end{aligned}
\]
Application of IntegralsArea under Simple CurvesApplycase_studymedium
More from Application of Integrals
- The area of the region enclosed between the curve y=x x, x -axis, x=-2 and x=2 is:2025 · asked 3×
- Roundabouts are often made on busy roads to ease the traffic and avoid red lights. One such round-about is…2026 · asked 3×
- Using integration, find the area of the smaller region enclosed by the curve 4 x^2+4 y^2=9 and the line 2 x+2…2022 · asked 3×
- Find the area of the region bounded by the curve 4 x^2+y^2=36 using integration.2024 · asked 3×
- The area of the shaded region (figure) represented by the curves y=x^2, 0 ≤ x ≤ 2 and y -axis is given by2025 · asked 3×
- Sketch the graph of y=x x and hence find the area bounded by this curve, X -axis and the ordinates x=-2 and…2024 · asked 3×
- There is a triangular park in the society. The park is divided into two sections as shown in the figure. In…2026 · asked 3×
- Using integration, find the area of the region bounded by the line y=5 x+2, the x -axis and the ordinates…2025 · asked 3×
CBSE Class 12 Mathematics past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.