7.7 लिटर प्रति सेकंद या वेगाने पाईपद्वारे टाकी रिकामी केली गेली. जर टाकीची अंतर्गत त्रिज्या 10.5 मीटर असेल तर टाकीचा \(\frac{2}{3}\) भाग रिकामा करण्यासाठी किती वेळ (तासांमध्ये) लागेल?

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SSC CGL Tier 2 Quant Previous Paper 2 (Held On: 16 November 2020)
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  1. \(\frac{185}{3}\)
  2. \(\frac{175}{3}\)
  3. \(\frac{185}{6}\)
  4. \(\frac{175}{2}\)

Answer (Detailed Solution Below)

Option 2 : \(\frac{175}{3}\)
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Detailed Solution

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दिलेल्याप्रमाणे:

टाकीची अंतर्गत त्रिज्या 10.5 मीटर आहे

7.7 लिटर प्रति सेकंद या वेगाने पाईपद्वारे टाकी रिकामी केली गेली.

संकल्पना:

अर्धगोलाचे घनफळ = 2π/3 × r3

1 m3 = 1000 L

1000 cm3 = 1 L

गणना:

अर्धगोलीय टाकीचे घनफळ खालीलप्रमाणे आहे

⇒ 2/3 × 22/7 × 10.5 × 10.5 × 10.5

⇒ 2425.5 m3

टाकीची क्षमता खालीलप्रमाणे आहे

⇒ 2425.5 × 1000 L

⇒ 2425500 L

म्हणून, 

टाकीचा 2/3 भाग रिकामा करण्यासाठी पाईपद्वारे लागणारा वेळ खालीलप्रमाणे आहे 

⇒ (2/3 × 2425500) ÷ 7.7 सेकंद

⇒ 210,000 सेकंद

वेळ ही तासात दर्शविली आहे

⇒ 210,000/3600

⇒ 175/3 तास

∴ आवश्यक वेळ 175/3 तास आहे.

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