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Most Important Selected Qs for JEE AdvancedMathematicsStraight Lines

Paragraph: Square A B C D has vertices A(1,4), B(5,4), C(5,8) and D(1,8) from a point P outside the square, a vertex of square is said to be visible if it can be connected to P by a straight line that does not pass through square. Thus from any point P , outside either two or three of the vertices of the square are visible. The visible area of P is the area of one triangle or the sum of the area of the two triangle f

Options

  1. A10
  2. B20
  3. C-30
  4. D40

Correct answer

B. 20

Step-by-step solution

The visible are of P(2,-6) is the area of A B P A B P has base A B of length 4 and its height is the distance from A B to point P . Which is 10 , since A B is parallel to x -axis. Thus area = 1 2 b h =20

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