If \(5\sqrt3+\sqrt{243}=24.249\), then what will be the value of \(\sqrt{192}+15\sqrt 3\) ?

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UP Police Constable Re-Exam 2024 Official Paper (Held On: 25 Aug, 2024 Shift 2)
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  1. 38.84
  2. 37.84
  3. 40.84
  4. 39.84

Answer (Detailed Solution Below)

Option 4 : 39.84
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Detailed Solution

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Given:

5√3 + √243 = 24.249

We need to find the value of: √192 + 15√3

Formula used:

Simplify square roots and use basic arithmetic.

Calculation:

√243 = √(81×3) = 9√3

Given: 5√3 + 9√3 = 24.249

⇒ 14√3 = 24.249

⇒ √3 = 24.249 / 14

⇒ √3 = 1.732

Next, simplify √192:

√192 = √(64×3) = 8√3

So, √192 + 15√3 = 8√3 + 15√3

⇒ 23√3 = 23 × 1.732

⇒ 23√3 = 39.836

⇒ Round off to two decimal places = 39.84

∴ The correct answer is 39.84 (option 4).

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