ANSWER
[tex]3hr30\min [/tex]EXPLANATION
Given that; the distance is 189m and the speed is 54mph.
That is;
[tex]\begin{gathered} d=189m \\ s=54\text{mph} \end{gathered}[/tex]Using the formula for speed;
[tex]s=\frac{d}{t}[/tex]Now making time (t) the subject of the formula, we have;
[tex]\begin{gathered} t=\frac{d}{s} \\ \end{gathered}[/tex]Now substituting the values, we have;
[tex]\begin{gathered} t=\frac{d}{s} \\ t=\frac{189m}{54\text{mph}} \\ =3.5hr \\ =3hr30\min \end{gathered}[/tex]Hence, 3.5hr means 3hours 30minutes
