Homework Help

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

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hadjartahax | Student, Grade 9 | (Level 1) Salutatorian

Posted November 6, 2012 at 4:40 PM via web

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

4 Answers | Add Yours

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lizziexiao | Student, Grade 9 | eNotes Newbie

Posted November 6, 2012 at 4:46 PM (Answer #1)

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19710seconds

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mathsworkmusic | (Level 1) Educator

Posted November 6, 2012 at 5:01 PM (Answer #2)

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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

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musicbyabhi | Student, Grade 9 | (Level 1) eNoter

Posted November 6, 2012 at 7:24 PM (Answer #3)

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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

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vantyne14 | Middle School Teacher | (Level 1) Adjunct Educator

Posted November 6, 2012 at 7:51 PM (Answer #4)

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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.

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