# Lesson 8

Scale Drawings and Maps

Let’s use scale drawings to solve problems.

### 8.1: A Train and a Car

Two cities are 243 miles apart.

• It takes a train 4 hours to travel between the two cities at a constant speed.

• A car travels between the two cities at a constant speed of 65 miles per hour.

Which is traveling faster, the car or the train? Be prepared to explain your reasoning.

### 8.2: Driving on I-90

1. A driver is traveling at a constant speed on Interstate 90 outside of Chicago. If she traveled from Point A to Point B in 8 minutes, did she obey the speed limit of 55 miles per hour? Explain your reasoning.
2. A traffic helicopter flew directly from Point A to Point B in 8 minutes. Did the helicopter travel faster or slower than the driver? Explain or show your reasoning.

Use the Distance tool  to measure the shortest distance between two points.

### 8.3: Biking through Kansas

A cyclist rides at a constant speed of 15 miles per hour. At this speed, about how long would it take the cyclist to ride from Garden City to Dodge City, Kansas?

Jada finds a map that says, “Note: This map is not to scale.” What do you think this means? Why is this information important?

### Summary

Maps with scales are useful for making calculations involving speed, time, and distance. Here is a map of part of Alabama.