Nadia's school day starts at 07:30 in 24-hour time. Her Maths lesson begins 45 minutes after school starts and lasts 1 hour and 15 minutes. What time does Nadia's Maths lesson end, in 24-hour notation?
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Worked Solution
Step 1: Find when the Maths lesson begins.
07:30 + 45 minutes: 30 + 45 = 75 minutes = 1 hour 15 minutes
07 + 1 = 08 hours, 15 minutes → Maths begins at 08:15.
Step 2: Find when the Maths lesson ends.
08:15 + 1 hour 15 minutes:
Add 1 hour: 08:15 + 1:00 = 09:15
Add 15 minutes: 09:15 + 0:15 = 09:30
Answer: Nadia's Maths lesson ends at 09:30.
Correct answer: 09:30
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