Answer:
9 hours
Step-by-step explanation:
[tex]Lets\ say\ the\ answer\ is\ x\ hours[/tex]
[tex]6\times4\frac{1}{2}=3x[/tex]
[tex]6\times\frac{9}{2}=3x[/tex]
[tex]27=3x[/tex]
[tex]x=27\div3[/tex]
[tex]x=9[/tex]
[tex]\left(Simple\ calculation\right)[/tex]
I hope this helps you
:)