524600 minutes in a year
How 
one hour 60 minute
one day 60 X 24 = 1440 minute per day.
one year 365 days.
see how many minutes in a year
=1440 (minutes) X 365 (days)
= 524600 minutes in a year.

How many seconds in a year?
=  (524600 minutes in a year.) X 60 [ one minute = 60 seconds ]
= 3,147,600 seconds in a year.

How many hours in a year?
= Total year days X Total one Day Hours
Total year days = 365 days
Total one Day hours = 24 hours
= 365 days X 24 hours
= 8760 hours in a year.

 
--
Kind Regards,
Md Masudur Rahman