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JEE Mains · Maths · STD 11 - 9. straight line

मान लीजिए कि एक \(\triangle P Q R\) का क्षेत्रफल जिसके शीर्ष \(P(5,4), Q(-2,4)\) और \(R(a, b)\) हैं, 35 वर्ग इकाई है। यदि इसका लंबकेन्द्र और केन्द्रक क्रमशः \(O\left(2, \frac{14}{5}\right)\) और \(C(c, d)\) हैं, तो \(c+2 d\) = __________

  1. A \(\frac{8}{3}\)
  2. B \(\frac{7}{3}\)
  3. C \(2\)
  4. D \(3\)
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Answer & Solution

Correct Answer

(D) \(3\)

Step-by-step Solution

Detailed explanation

\begin{aligned} & \text { Equation of lines } Q R=5 x+2 y+2=0 \\ & \text { Equation of lines } P R=10 x-3 y-38=0 \\ & \therefore \text { Point } R(2,-6) \\ & \text { Centroid }=\left(\frac{5-2+2}{3}, \frac{4+4-6}{3}\right) \\ & =\left(\frac{5}{3}, \frac{2}{3}\right) \\ & c+2…

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