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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
Is 1 in a half hour is 50 mins?
No.
The number of eggs in a basket double every minute the basket is full in half an hour when was it half full?
29 mins, because at 30 mins it will have doubled the amount at 29 mins, making 29 mins halfway. it is NOT 30 mins!!
What is 20 mins. after 645 pm?
Half an hour before 12 noon
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