Question
Wesley's boxing class usually lasts 1 h 40 min. However, last Tuesday, Wesley's class lasted 2 min longer than usual. The class started 9 min late. As such, Wesley's class ended at 6.39 p.m. instead of the usual time. What time does Wesley's boxing class usually start? (Leave your answer in 24-hour clock format.)
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Wesley's boxing class usually lasts 1 h 40 min. However, last Tuesday, Wesley's class lasted 2 min longer than usual. The class started 9 min late. As such, Wesley's class ended at 6.39 p.m. instead of the usual time. What time does Wesley's boxing class usually start? (Leave your answer in 24-hour clock format.)