A swimming lesson started at 14 50 and ended at 16 25. What was the duration of the swimming lesson?
- 75 min
- 95 min
- 135 min
- 175 min
Need a hint?
Break the time into parts: first count the minutes to the next hour, then count the whole hours, then add the remaining minutes.
Worked answer
- From 14 50 to 15 00 is 10 min.
- From 15 00 to 16 00 is 1 h or 60 min.
- From 16 00 to 16 25 is 25 min.
- Total duration = 10 + 60 + 25 = 95 min.
Answer: 95 min
The mistake this question tests
Habit
Minutes and hours in rate
Pupils often subtract 50 from 25 directly and get a negative number, or they treat 1 hour as 100 minutes and subtract 1450 from 1625 to get 175.
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