एक खेत एक समचतुर्भुज के आकार का है, जिसका परिमाप 292 मीटर है और इसका एक विकर्ण 96 मीटर है। खेत का क्षेत्रफल कितना है?

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RRB NTPC CBT 2 (Level-3) Official Paper (Held On: 14 June 2022 Shift 2)
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  1. 4800 वर्गमीटर
  2. 7008 वर्गमीटर
  3. 5280 वर्गमीटर
  4. 5040 वर्गमीटर

Answer (Detailed Solution Below)

Option 3 : 5280 वर्गमीटर
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RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
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दिया गया है:

एक खेत एक समचतुर्भुज के आकार का है, जिसका परिमाप 292 मीटर है और इसका एक विकर्ण 96 मीटर है। 

प्रयुक्त अवधारणा:

एक समचतुर्भुज का क्षेत्रफल = दोनों विकर्णों की लंबाई का गुणनफल ÷ 2

समचतुर्भुज की स्थिति में,

भुजा2 = (दीर्घ विकर्ण/2)(लघु विकर्ण/2)2

गणना:

माना कि दूसरा विकर्ण D है।

प्रश्नानुसार,

732 = (96/2)2 + (D/2)2

⇒ (D/2)2 = 732 - 482

⇒ (D/2)2 = 3025

⇒ (D/2)2 = 552

⇒ D/2 = 55

⇒ D = 110

अत: समचतुर्भुजाकार खेत का क्षेत्रफल\({110 \times 96} \over 2\) = 5280 वर्गमीटर

खेत का क्षेत्रफल 5280 वर्गमीटर है।

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