Answer :
[tex]1\ hour\ contain\ 3600\ seconds\\\\
3,14\ hour\ contain\ x\ seconds\\\\ Write\ it\ as\ ratio:\\\\
1-3600\\
3,14-x\\Cross\ multiplication:\\\\
x=3600*3,14= 11304\ seconds\\\\
In\ 3,14\ hours\ are\ 11304\ seconds.[/tex]