Δ

ABC में, AB = 48 सेमी, BC = 55 सेमी और AC = 73 सेमी हैं। यदि O त्रिभुज का केन्द्रक है, तो BO की लंबाई (सेमी में) (एक दशमलव स्थान तक सही) है:

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SSC CGL Tier 2 Quant Previous Paper 2 (Held On: 3 Feb 2022)
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  1. 25.6
  2. 24.3
  3. 20.4
  4. 18.3

Answer (Detailed Solution Below)

Option 2 : 24.3
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PYST 1: SSC CGL - General Awareness (Held On : 20 April 2022 Shift 2)
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Detailed Solution

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दिया गया हैं:

ΔABC में 

AB = 48 सेमी, BC = 55 सेमी और AC = 73 सेमी 

O त्रिभुज का केन्द्रक है। 

प्रयुक्त सूत्र:

केन्द्रक माध्यिका को 2 :1 के अनुपात में विभाजित करता है। 

एक समकोण त्रिभुज में

समकोण शीर्ष से माध्यिका की लंबाई = कर्ण की लंबाई/2

गणना:

चूँकि 48, 55, और 73 एक त्रिक है। 

तो, ΔABC एक समकोण त्रिभुज है, और ∠B = 90°

हम जानते हैं कि एक समकोण त्रिभुज में

समकोण शीर्ष से माध्यिका की लंबाई = कर्ण की लंबाई/2

तो, BM = AC/2 = 73/2

और हम जानते हैं कि OB : OM = 2 : 1 

तो, OB = (2/3) × (73/2) = 24.33

∴ OB की लंबाई 24.33 सेमी है।

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