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Question

If P and Q are two points on the line 4x + 3y + 30 = 0 such that OP = OQ = 10, where O is the origin, then the area of the Δ OPQ is

A
48
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B
16
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C
32
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D
None of these
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Solution

The correct option is A 48
Let ORPQThen,OR=|4(0)+3(0)+30|16+9=305=6

PR=OP2OR2=10036and PQ=2PR=16. Area of OPQ=12×PQ×QR=12×16×6=48

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