If in the â–³ABC the equation of the side BC is x+2y=3, the vertex A is (1,2) and the abscissa of the orthocentre is 3, then the ordinate of the orthocentre is
A
6
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B
4
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C
2
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D
0
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Solution
The correct option is A6
Here, BC is x+2y=3,
Altitude from A is perpendicular to BC.
The equation of altitude from A with slope 2 is y−2=2(x−1) =>y=2x Abscissa is x=3, then ordinate is 6.