4024/12 Oct/Nov 2023, Question 10: Estimation
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
Estimate the value of √((1240 × 3.8)/11.2) by rounding each number to 1 significant figure.
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Solution · 2 marks
- 1Rounded values: 1240 ≈ 1000, 3.8 ≈ 4, 11.2 ≈ 10
- 2√((1000 × 4)/10) = √(4000/10)
- 3= √400 = 20
Answer20
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