Question
Tommy's swimming class usually lasts 1 h 45 min. However, last Monday, Tommy's class lasted 19 min longer than usual. The class started 6 min late. As such, Tommy's class ended at 5.39 p.m. instead of the usual time. What time does Tommy's swimming class usually start? (Leave your answer in 24-hour clock format.)
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Tommy's swimming class usually lasts 1 h 45 min. However, last Monday, Tommy's class lasted 19 min longer than usual. The class started 6 min late. As such, Tommy's class ended at 5.39 p.m. instead of the usual time. What time does Tommy's swimming class usually start? (Leave your answer in 24-hour clock format.)