### Home > PC3 > Chapter 2 > Lesson 2.3.3 > Problem2-157

2-157.

​​Suppose a car drives $30$ miles an hour for $2$ hours, 40 miles an hour for one hour, and $50$ miles an hour for half an hour.

1. How far does the car travel?

$30 \frac { mi } { h } \cdot 2 h + 40 \frac { mi } { h } \cdot 0.5 h$

2. What is the car’s average speed?

$\text { average speed } = \frac {\text { total distance }} {\text { total time }}$