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A line is drawn perpendicular to line `y=5x ,` meeting the coordinate axes at `Aa n dB` . If the area of triangle `O A B` is 10 sq. units, where `O` is the origin, then the equation of drawn line is (a) `3x-y-9` (b) `x+5y=10` `x+4y=10` (d) `x-4y=10`

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