4024/13 May/Jun 2025, Question 7: Estimation
Cambridge O Level Mathematics 4024 · Paper 13 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
Estimate the seed cost for a 14 m by 19 m lawn at $0.34 per m² by rounding each number to 1 significant figure.
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Solution · 3 marks
- 114 ≈ 10, 19 ≈ 20, 0.34 ≈ 0.3
- 2Area ≈ 10 × 20 = 200 m²
- 3Cost ≈ 200 × 0.3 = $60
Answer60
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