Respuesta :

the total time is ,

3/4 + 1/2 + 1/4 =

[tex]\begin{gathered} =\frac{3}{4}+\frac{1}{2}+\frac{1}{4} \\ =\frac{3+2+4}{4} \\ =\frac{9}{4} \end{gathered}[/tex]

so the total time is

9/4 hrs = 2.25 hours

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