Let ABC be the triangle such that the equations of lines AB and AC be 3y−x=2 and x+y=2, respectively, and the points B and C lie on x-axis. If P is the orthocentre of the triangle ABC, then the area of the triangle PBC is equal to
(A)4
(B)10
(C)8
(D)6✓ Correct
Answer: (D)
Solution
The vertex A is the intersection of 3y−x=2 and x+y=2, namely A(1,1); setting y=0 in each gives B(−2,0) and C(2,0) on the x-axis. Since BC lies along the x-axis, the altitude from A is the vertical line x=1; the altitude from B, perpendicular to AC whose slope is −1, is y=x+2. These meet at the orthocentre P(1,3). Taking BC=4 as base and the ordinate of P as height, the area of triangle PBC is 21⋅4⋅3=6.
JEE Main · 2025 · 07 Apr 2025 · Shift 1 · Single correct option