Mathematics for IGCSE & O level - Time (Section 3 - No. 2)
An aircraft leaves Karachi at 11:35, local time, to fly to London. The flight time is 8 hours 30 minutes. The time in London is 4 hours behind the time in Karachi. What is the local time in London when the aircraft arrives?
15:05
16:05
07:05
19:05
Explanation
First calculate the arrival time in Karachi: 11:35 + 8 hours 30 minutes = 20:05. Then subtract 4 hours (London time is behind Karachi) to get the arrival time in London: 20:05 - 4 hours = 16:05 (4:05 p.m.). Therefore, the correct answer will be 16:05. Check the arrival time, then go backwards 4 hours: 16:05 (London time) – 8:30 mins (flight) – 4 hours (difference between Karachi and London).
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