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Convert 20 minutes into seconds (20 * 60). There are sixty seconds in a minute. This would make 1200 seconds. Then add the 45 seconds (1245). Convert 30 minutes (1/2 an hour) into seconds (30 * 60). Then subtract 1245 from 1800. This would leave 555 seconds or 9 minutes, 15 seconds. I hope this helps.
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Earn +20 ptsQ: How do you subtract 20 mins. 45 seconds from one half hour?
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What fraction is 19 seconds of an hour?
There are 60 seconds in a min. and 60 mins. in an hour = 3600 seconds in an hour. 19 seconds is therefore 19/3600 of and hour.
What is half of 7 minutes and 24 seconds?
3 mins and 42 seconds
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No.
The number of eggs in a basket double every minute the basket is full in half an hour when was it half full?
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Half an hour before 12 noon
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