Multiple choice

What approximate value will come in place of question mark (?) in the following questions?(29.73\% \text{ of } 403.6 + \sqrt{1222} - 3.09\% \text{ of } 487 =?)

  1. 120

  2. 140

  3. 165

  4. 170

  5. 175

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Approximate: 30% of 400 = 120, √1225 = 35, 3% of 500 = 15. Result: 120 + 35 - 15 = 140. More precisely: 0.2973 × 403.6 ≈ 120, √1222 ≈ 34.96, 0.0309 × 487 ≈ 15.05. Total: 120 + 34.96 - 15.05 ≈ 140. Option B is correct.