1 minute = 60 seconds
1 hour = 60 minutes
1 day = 24 hours
1 year = 365 days
21 years = (21 x 365 x 24 x 60 x 60) = 662,256,000.
Add 5 days for 5 leap years in 21 years: 5 days = (5 x 24 x 60 x 60) = 432,000, seconds
On his 21st birthday, at the exact hour, minute, and second that he was born, the 21-yr-old is (662,256,000 + 432,000)
= 662,688,000 seconds old.
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662,695,446 seconds.
1260 seconds
261 seconds if i did my math correctly :)
There are 60 seconds in one minute. Therefore, 321 seconds is equal to 321/60 = 5 remainder 21 or 5 minutes 21 seconds.
April 21, 1973 to November 8, 2009 = 36years 6months 18daysHours, minutes, and seconds depends on What time on 4/21/73 until What time on 11/08/09.Happy Birthday on Sunday anyway.