0580/21 Oct/Nov 2023, Question 16: Upper and Lower Bounds
Cambridge IGCSE Mathematics 0580 · Paper 21 (Extended) · Calculator · 3 marks
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The question, in short
Using P = 2w + 2h with w = 11 and h = 9.5, each given to 2 significant figures, find the lower and upper bounds for P.
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Solution · 3 marks
- 1w: 10.5 ≤ w < 11.5; h: 9.45 ≤ h < 9.55
- 2Lower bound P = 2 × 10.5 + 2 × 9.45 = 21 + 18.9 = 39.9
- 3Upper bound P = 2 × 11.5 + 2 × 9.55 = 23 + 19.1 = 42.1
- 4Lower bound = 39.9, Upper bound = 42.1
AnswerLower bound = 39.9, Upper bound = 42.1
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Also searched as: 0580/21/O/N/23 · 0580_w23_qp_21 · 0580 w23 21 · question 16.
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