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0580/12 Feb/Mar 2022, Question 7: Time Calculations

Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 4 marks

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The question, in short

Convert a 12-hour time to 24-hour format, work out a journey duration spanning midnight in hours and minutes, and convert 10 260 seconds into hours.

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

Part (a) · 1 mark

Express 5.26 pm on the 24-hour clock.

  1. 1pm: add 12 to the hour, 5 + 12 = 17
  2. 25.26 pm = 17 26

Answer1726

Part (b) · 1 mark

Find the time from 21 15 to 04 33 the following day, in hours and minutes.

  1. 121 15 to 04 15 = 7 h
  2. 204 15 to 04 33 = 18 min
  3. 3Time = 7 h 18 min

Answer7 h 18 min

Part (c) · 2 marks

Convert 10 260 seconds to hours.

  1. 11 hour = 60 × 60 = 3600 seconds
  2. 210 260 ÷ 3600 = 2.85 hours

Answer2.85

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