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Solve this problem by doing dimensional analysis.
Start with your given (the number you are given):
21 hours
Next, obtain some conversion ratios/factors. There are 60 minutes in 1 hour. There also 60 seconds in 1 minute.
21 hours x 60 minutes/1 hour x 60 seconds/1 minute
Multiply and divide it out to get 75600 seconds.
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How many seconds is 5 years 21 days 4 hours 32 minuets and 17 seconds?
5 years 21 days 4 hours 32 minutes and 17 seconds = 159,615,367.00146776438 seconds.
What is 34281 seconds in hours minutes and seconds?
34281 seconds = 9 hours 31 minutes and 21 seconds.
How many hours minutes and seconds are there in 21 hours 751 minutes and 1505 seconds?
1505 seconds is 25 minutes and 5 seconds Add 25 minutes to 751 giving 776 minutes. This is 12 hours and 31 minutes Add 12 hours to 21 hours. This is 33 hours, that is 1 day and 9 hours. So we have 1day 09hours 00minutes 00seconds + 0day 12hours 31minutes 00seconds + 0day 00hours 05minutes 05seconds _____________________________ 1day 21hours 36minutes 05seconds _____________________________
How many seconds in 20 hours?
72000 seconds
How many seconds are in 34 hours?
122400 seconds
