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0580/11 Oct/Nov 2023, Question 24: Unit Conversions

Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks

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The question, in short

Convert 1.2 m² to mm², then compare Sophie's speed of 1200 m/min with an 80 km/h limit and show hers is lower.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

Change 1.2 m² into mm².

  1. 11 m² = 1000 × 1000 = 1 000 000 mm²
  2. 21.2 m² = 1 200 000 mm²

Answer1 200 000

Part (b) · 2 marks

Given an 80 km/h limit and Sophie's 1200 m/min, show her speed is below the limit.

  1. 11200 m/min × 60 = 72 000 m/h
  2. 272 000 ÷ 1000 = 72 km/h
  3. 372 km/h < 80 km/h, so Sophie is below the speed limit

Answer(1200 × 60)/1000 = 72 km/h, or (80 × 1000)/60 = 1333.3… m/min

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Also searched as: 0580/11/O/N/23 · 0580_w23_qp_11 · 0580 w23 11 · question 24.
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