PQRS एक समचतुर्भुज है। इसकी प्रत्येक भुजा 40 सेमी है। यदि PR = 64 सेमी और QS = (8x + 8) है। तब, x का मान क्या है?

  1. 6
  2. 5
  3. 4
  4. 7

Answer (Detailed Solution Below)

Option 2 : 5
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F1 Ashish Singh 13.1.21 Pallavi D13

PR = 64 सेमी 

इस प्रकार, PO = RO = 32 सेमी 

QS = (8x + 8) सेमी 

इस प्रकार, QO = OS = (4x + 4) सेमी 

Δ SOR में –

\(S{R^2} = S{O^2} + R{O^2}\)

⇒ \({40^2} = {\left( {4{\rm{x}} + 4} \right)^2} + {\left( {32} \right)^2}\)

⇒ 402 – 322 = (4x + 4)2

⇒ 4x + 4 = 24

⇒ 4x + 4 = 24

⇒ 4x = 20

⇒ x = 5 सेमी

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