What value would come in place of the question mark (?) in the following equation?
\(\sqrt[3]{2744} + \sqrt[3]{4096} + \sqrt{?} = 38.5 \)

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MP Police Constable 2023 Official Paper (Held On: 11 Sept, 2023 Shift 2)
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  1. 62.25
  2. 72.75
  3. 72.25
  4. 82.25

Answer (Detailed Solution Below)

Option 3 : 72.25
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Detailed Solution

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Given:

∛(2744) + ∛(4096) + √(?) = 38.5

Formula used:

Cubic root of a number: ∛(x)

Square root of a number: √(x)

Calculation:

∛(2744) = 14

∛(4096) = 16

⇒ 14 + 16 + √(?) = 38.5

⇒ 30 + √(?) = 38.5

⇒ √(?) = 38.5 - 30

⇒ √(?) = 8.5

⇒ ? = 8.5 × 8.5

⇒ ? = 72.25

∴ The correct answer is option (3).

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