There are 5400 seconds in an hour and a half.
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60 seconds an 1 minute 60 minutes in 1 hour 30 minutes in half an hour 90 minutes in one and a half hours. So 90 minutes * 60 seconds = 5400 seconds
43200 seconds / 60 seconds in a minute / 60 minutes in an hour = 12 otherwise known as half a day
One week = 1,209,600 half-seconds.
1 hour = 3600 seconds 30 minutes = 1800 seconds 1 hour + 30 minutes = 5400 seconds
The clock lost 32 seconds in 32 hours ie 1 second per hour. So in half an hour it would have lost half a second.