Multiple choice

In the following question what approximate value should come at place of question mark (?) 315.212 - 246.532 + 18.922 = ?2 × 6

  1. 24.88

  2. 52.72

  3. 45.8

  4. 80.56

  5. 72.9
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Calculate: 315.212 = 99358.5, 246.532 = 60777.6, 18.922 = 358.0. So: 99358.5 - 60777.6 + 358.0 = 99358.5 - 60419.6 = 38938.9. Then: ?² × 6 = 38938.9, so ?² = 38938.9/6 ≈ 6489.82. Then: ? = √6489.82 ≈ 80.56. Let me verify: 80.56² × 6 = 6490 × 6 = 38940. This matches option D.

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