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Application of Integrals · Question 20

JEE Main 2025 (Online) 8th April Evening ShiftNumericalMedium📈 Topic in 74% papers+4
1

Let the area of the bounded region \(x, y) : 0 9x y2, y 3x - 6 \ be A. Then 6A is equal to .

Answer

15

Solution

0 9x y2 x 0 and the point lies outside (or on) the parabola y2 = 9x, i.e. y 3 x or y -3 x.

y 3x - 6: the point lies above the line y = 3x - 6.

Line and parabola meet where y2 = 3(y + 6) y2 - 3y - 18 = 0 y = -3, 6, i.e. at (1, -3) and (4, 6).

[figure]

The part above y = 3 x is unbounded; the bounded part lies between y = 3x - 6 and y = -3 x for 0 x 1.

A = 01 [-3 x - (3x - 6) ] dx

= [-2x 32 - 3x22 + 6x ]01

= -2 - 32 + 6 = 52

6A = 15

Answer: 15

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2

If the area of the region bounded by the curves y = 4 - x24 and y = x-42 is equal to , then 6 equals

  1. 210
  2. 250
  3. 240
  4. 220
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3

If the area of the region \(x, y) : 1 + x2 y \x + 7, 11 - 3x\\ is A, then 3A is equal to :

  1. 50
  2. 46
  3. 49
  4. 47
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4

If the area of the region \(x, y) : |x - 5| y 4 x\ is A, then 3A is equal to .

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5

A line passing through the point A(-2, 0) touches the parabola P: y2 = x - 2 at the point B in the first quadrant. The area of the region bounded by the line AB, parabola P and the x-axis, is :

  1. 3
  2. 73
  3. 83
  4. 2
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6

The area of the region bounded by the curve y = \|x|, x|x-2|\, the x-axis and the lines x = -2 and x = 4 is equal to

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7

The area of the region \(x, y) : |x - y| y 4 x\ is

  1. 5123
  2. 20483
  3. 512
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JEE Main 2025 (Online) 3rd April Evening Shift
8

If the area of the region \(x, y) : |4 - x2 | y x2, y 4, x 0 \ is ( 80 2 - ), , N, then + is equal to .

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9

Let the area of the region \(x, y) : 2y x2 + 3, y + |x| 3, y |x - 1|\ be A. Then 6A is equal to :

  1. 14
  2. 18
  3. 16
  4. 12
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10

The area (in sq. units) of the region \(x, y) : 0 y 2|x| + 1, 0 y x2 + 1, |x| 3\ is

  1. 323
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  3. 173
  4. 803
JEE Main 2025 (Online) 28th January Morning Shift
11

The area of the region bounded by the curves x(1 + y2) = 1 and y2 = 2x is:

  1. 4 - 13
  2. 2 - 13
  3. 2 ( 2 - 13 )
  4. 12 ( 2 - 13 )
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