Question

If Julia drives 189 miles at a constant speed of 54 mph. How long will it take? ( Be sure to include units.) Answer (number then units): ,

Answer 1

`3hr30\min`

Step-by-step explanation

Given that; the distance is 189m and the speed is 54mph.

That is;

`\begin{gathered} d=189m \\ s=54\text{mph} \end{gathered}`

Using the formula for speed;

`s=(d)/(t)`

Now making time (t) the subject of the formula, we have;

`\begin{gathered} t=(d)/(s) \\ \end{gathered}`

Now substituting the values, we have;

`\begin{gathered} t=(d)/(s) \\ t=\frac{189m}{54\text{mph}} \\ =3.5hr \\ =3hr30\min \end{gathered}`

Hence, 3.5hr means 3hours 30minutes