4MA1/1H Jun 2020, Question 17: Upper and Lower Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 4 marks
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The question, in short
Given a 5 kg mass rounded to the nearest 50 g and a volume of 1.84 × 10⁻³ m³ to 3 s.f., find the upper bound density in kg/m³ to 1 d.p., showing working.
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Solution · 4 marks
- 1Mass upper bound = 5 + 0.025 = 5.025 kg
- 2Volume lower bound = 1.835 × 10⁻³ m³
- 3Greatest density = greatest mass ÷ least volume
- 45.025 ÷ 0.001835 = 2738.41… = 2738.4
Answer2738.4
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