Delayed clock

Michael put a new battery into his watch at midnight. However, they are 5 seconds late each minute. How many hours does the watch show in 24 hours?

Result

t = 22:00 hh:mm Wrong answer

Solution:

t=24.00−53600⋅ 24⋅ 60=22:00 hh:mmt=24.00-\dfrac{ 5 }{ 3600 } \cdot \ 24 \cdot \ 60=22:00 \ \text{hh}:\text{mm}

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