Chapter 11.2, Problem 7QR

Solution

To find: The distance travelled by the truck in $4\text{hr}$ .

The distance travelled by the truck in $4\text{hr}$ is $228\text{mi}$ .

Given information:

The speed of truck is $57\text{mph}$ .

The time taken by the truck is $4\text{hr}$ .

Formula used:

If the speed of the vehicle is $r$ then the distance travelled by it in $t$ time is $d=rt$ .

Calculation:

Using the formula $d=rt$

Substitute $57$ mph for $r$ and $4$ hr for $t$ .

  $\begin{array}{c}d=\left(57\text{mph}\right)\left(4\text{hr}\right)\\ d=228\text{mi}\end{array}$

Thus the distance travelled by the truck in $4\text{hr}$ is $228\text{mi}$ .