4024/22 May/Jun 2025, Question 23: Upper and Lower Bounds
Cambridge O Level Mathematics 4024 · Paper 22 (Calculator) · Calculator · 3 marks
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The question, in short
Using a 500 m distance rounded to the nearest 5 m and a time of 24.7 s rounded to the nearest 0.1 s, work out the smallest possible value of Zara's average speed.
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Solution · 3 marks
- 1Lower bound of distance = 500 − 2.5 = 497.5 m
- 2Upper bound of time = 24.7 + 0.05 = 24.75 s
- 3Lower bound of speed = 497.5 ÷ 24.75
- 4= 20.10… m/s
Answer20.1 or 20.10…
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Also searched as: 4024/22/M/J/25 · 4024_s25_qp_22 · 4024 s25 22 · question 23.
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