3 सेमी व्यासाचा,शिशाचा एक गोलाकार चेंडू,  वितळला जातो आणि तीन गोलाकार बॉलमध्ये पुनर्निर्मित केला जातो. या दोन चेंडूंचा व्यास अनुक्रमे \(\frac{3}{2}\) सेमी आणि 2 सेमी आहे. तिसऱ्या चेंडूचा व्यास शोधा.

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SSC CGL 2023 Tier-I Official Paper (Held On: 17 Jul 2023 Shift 4)
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  1. 2.1सेमी
  2. 3.3 सेमी
  3. सेमी
  4. 2.5 सेमी

Answer (Detailed Solution Below)

Option 4 : 2.5 सेमी
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Detailed Solution

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दिले आहे:

गोलाकार चेंडूचा व्यास (D) = 3 सेमी

पहिल्या लहान चेंडूचा व्यास (D1) = 1.5 सेमी

दुसऱ्या लहान चेंडूचा व्यास (D2)= 2 सेमी

वापरलेली संकल्पना:

लहान गोलाकार चेंडूचे एकूण घनफळ = मोठ्या गोलाकार चेंडूचे घनफळ

वापरलेले सूत्र:

गोलाकार चेंडूचे  घनफळ = (4/3) × π × R3

गणना:

तिसऱ्या लहान गोलाकार चेंडूचा व्यास = D3  समजू

(पहिला लहान गोलाकार चेंडू + दुसरा गोलाकार चेंडू + तिसरा गोलाकार चेंडू) = मोठ्या गोलाकार चेंडूचे घनफळ

⇒ 4/3 π × (D1/2)3 +  4/3 π × (D2/2)3 + 4/3 π × (D3/2)3 = 4/3 π (D/2)3

⇒ 4/3 π × [(1.5/2)3 + (2/2)3 + (D3/2)3 ]= 4/3 π (3/2)3

⇒ [(3.375/8) + 1 + (D3/2)3 ] = 3.375

⇒ (D3/2)3 = 2.375 - (3.375/8)

⇒ (D3/2)3 = (19 - 3.375)/8

⇒ D3 = 3√15.625 = 2.5

योग्य उत्तर 2.5 आहे.

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