Question
Sean's archery class usually lasts 1 h 20 min. However, last Saturday, Sean's class lasted 12 min longer than usual. The class started 9 min late. As such, Sean's class ended at 4.11 p.m. instead of the usual time. What time does Sean's archery class usually start? (Leave your answer in 24-hour clock format.)
4 m

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Sean's archery class usually lasts 1 h 20 min. However, last Saturday, Sean's class lasted 12 min longer than usual. The class started 9 min late. As such, Sean's class ended at 4.11 p.m. instead of the usual time. What time does Sean's archery class usually start? (Leave your answer in 24-hour clock format.)