Multiple choice

What approximate value should come at place of question mark (?) in the following questions?(87 \times 129 \div 15 = ?^{2} + 12.5\% \text{ of } 1378)

  1. 19

  2. 10

  3. 20

  4. 24

  5. 40
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Calculate step by step: 87 × 129 = 11223, then 11223 ÷ 15 = 748.2. 12.5% of 1378 = 172.25. So the equation becomes 748.2 = ?² + 172.25. Therefore ?² = 748.2 - 172.25 = 575.95, and ? = √575.95 ≈ 24. Answer D is correct.

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