# What is 5 hours, 28 min and 30 seconds in seconds?

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19710seconds

There are 60 seconds in a minute, so 28 mins = 28*60 seconds = 1680 seconds

There are 60 minutes in an hour, so 5 hrs = 5*60 mins = 300 mins

300 mins = 300*60 seconds = 18000 seconds, so 5 hrs = 18000 seconds

In total we have 5 hrs + 28 mins + 30 seconds = 18000 + 1680 + 30 = **19710 s**

You should know that 3600secs=1hr (60secs*60mins)

You should also know that 60 secs=1min

5hrs=3600*5 (=18000secs)

28mins=60*28 (=1680secs)

30secs=30secs

Add all the seconds together:

18000 + 1680 + 30 = 19710 secs

19,710 seconds

This is a unit conversion or dimensional analysis problem.

There are 60min in 1 hour and 60 seconds in 1 min. So you multiple straight across your divison signs and cross out the units that simplify. The number you are left with is the number of seconds in that amount of time.