0580/32 Feb/Mar 2025, Question 15: Unit Conversions
Cambridge IGCSE Mathematics 0580 · Paper 32 (Core) · Calculator · 3 marks
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The question, in short
Two-part question on speed and unit conversion: find a car's average speed in km/h from a given distance and time, then change 8 m/s into km/h.
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Part (a) · 1 mark
Calculate the average speed in km/h for a car covering 95 km in 2 hours 15 minutes.
- 12 hours 15 minutes = 2.25 hours
- 2Speed = 95 ÷ 2.25 = 42.22… ≈ 42.2 km/h
Answer42.2 or 42.22…
Part (b) · 2 marks
Convert 8 m/s into km/h.
- 18 m/s = 8 × 60 × 60 = 28 800 m per hour
- 228 800 ÷ 1000 = 28.8 km/h
Answer28.8
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